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Call it once at startup, then use the returned function in your framework's middleware\u002Fhook system.",[594,595,601],"pre",{"className":596,"code":597,"filename":598,"language":599,"meta":600,"style":600},"language-typescript shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","import { createAuthMiddleware } from 'evlog\u002Fbetter-auth'\n\nconst identify = createAuthMiddleware(auth, {\n  exclude: ['\u002Fapi\u002Fauth\u002F**', '\u002Fapi\u002Fpublic\u002F**'],\n  include: ['\u002Fapi\u002F**'],\n  maskEmail: true,\n})\n","server\u002Fmiddleware\u002Fauth-identify.ts","typescript","",[586,602,603,636,643,668,704,725,739],{"__ignoreMap":600},[604,605,608,612,616,620,623,626,629,633],"span",{"class":606,"line":607},"line",1,[604,609,611],{"class":610},"s7zQu","import",[604,613,615],{"class":614},"sMK4o"," {",[604,617,619],{"class":618},"sTEyZ"," createAuthMiddleware",[604,621,622],{"class":614}," }",[604,624,625],{"class":610}," from",[604,627,628],{"class":614}," '",[604,630,632],{"class":631},"sfazB","evlog\u002Fbetter-auth",[604,634,635],{"class":614},"'\n",[604,637,639],{"class":606,"line":638},2,[604,640,642],{"emptyLinePlaceholder":641},true,"\n",[604,644,646,650,653,656,659,662,665],{"class":606,"line":645},3,[604,647,649],{"class":648},"spNyl","const",[604,651,652],{"class":618}," identify ",[604,654,655],{"class":614},"=",[604,657,619],{"class":658},"s2Zo4",[604,660,661],{"class":618},"(auth",[604,663,664],{"class":614},",",[604,666,667],{"class":614}," {\n",[604,669,671,675,678,681,684,687,689,691,693,696,698,701],{"class":606,"line":670},4,[604,672,674],{"class":673},"swJcz","  exclude",[604,676,677],{"class":614},":",[604,679,680],{"class":618}," [",[604,682,683],{"class":614},"'",[604,685,686],{"class":631},"\u002Fapi\u002Fauth\u002F**",[604,688,683],{"class":614},[604,690,664],{"class":614},[604,692,628],{"class":614},[604,694,695],{"class":631},"\u002Fapi\u002Fpublic\u002F**",[604,697,683],{"class":614},[604,699,700],{"class":618},"]",[604,702,703],{"class":614},",\n",[604,705,707,710,712,714,716,719,721,723],{"class":606,"line":706},5,[604,708,709],{"class":673},"  include",[604,711,677],{"class":614},[604,713,680],{"class":618},[604,715,683],{"class":614},[604,717,718],{"class":631},"\u002Fapi\u002F**",[604,720,683],{"class":614},[604,722,700],{"class":618},[604,724,703],{"class":614},[604,726,728,731,733,737],{"class":606,"line":727},6,[604,729,730],{"class":673},"  maskEmail",[604,732,677],{"class":614},[604,734,736],{"class":735},"sfNiH"," true",[604,738,703],{"class":614},[604,740,742,745],{"class":606,"line":741},7,[604,743,744],{"class":614},"}",[604,746,747],{"class":618},")\n",[583,749,750,751,754,755,757,758,761],{},"The function signature is ",[586,752,753],{},"(log, headers, path?) => Promise\u003Cboolean>",". It resolves the session, calls ",[586,756,591],{},", captures timing into ",[586,759,760],{},"auth.resolvedIn",", fires lifecycle hooks, and silently catches errors so session resolution never breaks a request.",[763,764,346],"h2",{"id":765},"options",[583,767,768,769,776],{},"Inherits all ",[770,771,773,775],"a",{"href":772},"\u002Fuse-cases\u002Fbetter-auth\u002Fidentify-user#options",[586,774,591],{}," options",", plus:",[778,779,780,799],"table",{},[781,782,783],"thead",{},[784,785,786,790,793,796],"tr",{},[787,788,789],"th",{},"Option",[787,791,792],{},"Type",[787,794,795],{},"Default",[787,797,798],{},"Description",[800,801,802,823,842,861],"tbody",{},[784,803,804,810,815,820],{},[805,806,807],"td",{},[586,808,809],{},"exclude",[805,811,812],{},[586,813,814],{},"string[]",[805,816,817],{},[586,818,819],{},"['\u002Fapi\u002Fauth\u002F**']",[805,821,822],{},"Route patterns to skip (glob).",[784,824,825,830,834,839],{},[805,826,827],{},[586,828,829],{},"include",[805,831,832],{},[586,833,814],{},[805,835,836],{},[586,837,838],{},"undefined",[805,840,841],{},"If set, only matching routes are resolved.",[784,843,844,849,854,858],{},[805,845,846],{},[586,847,848],{},"onIdentify",[805,850,851],{},[586,852,853],{},"(log, session) => void",[805,855,856],{},[586,857,838],{},[805,859,860],{},"Called after successful identification.",[784,862,863,868,873,877],{},[805,864,865],{},[586,866,867],{},"onAnonymous",[805,869,870],{},[586,871,872],{},"(log) => void",[805,874,875],{},[586,876,838],{},[805,878,879],{},"Called when no session is found.",[763,881,883],{"id":882},"skip-the-routes-that-do-not-need-a-session","Skip the routes that do not need a session",[583,885,886],{},"Skip Better Auth's own routes and any public endpoints to avoid wasted database queries:",[594,888,890],{"className":596,"code":889,"language":599,"meta":600,"style":600},"const identify = createAuthMiddleware(auth, {\n  exclude: [\n    '\u002Fapi\u002Fauth\u002F**',     \u002F\u002F Better Auth itself\n    '\u002Fapi\u002Fpublic\u002F**',   \u002F\u002F Public endpoints\n    '\u002Fapi\u002Fhealth',      \u002F\u002F Health checks\n  ],\n})\n",[586,891,892,908,917,932,945,959,966],{"__ignoreMap":600},[604,893,894,896,898,900,902,904,906],{"class":606,"line":607},[604,895,649],{"class":648},[604,897,652],{"class":618},[604,899,655],{"class":614},[604,901,619],{"class":658},[604,903,661],{"class":618},[604,905,664],{"class":614},[604,907,667],{"class":614},[604,909,910,912,914],{"class":606,"line":638},[604,911,674],{"class":673},[604,913,677],{"class":614},[604,915,916],{"class":618}," [\n",[604,918,919,922,924,926,928],{"class":606,"line":645},[604,920,921],{"class":614},"    '",[604,923,686],{"class":631},[604,925,683],{"class":614},[604,927,664],{"class":614},[604,929,931],{"class":930},"sHwdD","     \u002F\u002F Better Auth itself\n",[604,933,934,936,938,940,942],{"class":606,"line":670},[604,935,921],{"class":614},[604,937,695],{"class":631},[604,939,683],{"class":614},[604,941,664],{"class":614},[604,943,944],{"class":930},"   \u002F\u002F Public endpoints\n",[604,946,947,949,952,954,956],{"class":606,"line":706},[604,948,921],{"class":614},[604,950,951],{"class":631},"\u002Fapi\u002Fhealth",[604,953,683],{"class":614},[604,955,664],{"class":614},[604,957,958],{"class":930},"      \u002F\u002F Health checks\n",[604,960,961,964],{"class":606,"line":727},[604,962,963],{"class":618},"  ]",[604,965,703],{"class":614},[604,967,968,970],{"class":606,"line":741},[604,969,744],{"class":614},[604,971,747],{"class":618},[583,973,974],{},"For high-traffic apps, flip the model and only resolve sessions on routes that need them:",[594,976,978],{"className":596,"code":977,"language":599,"meta":600,"style":600},"const identify = createAuthMiddleware(auth, {\n  include: ['\u002Fapi\u002Fdashboard\u002F**', '\u002Fapi\u002Faccount\u002F**'],\n})\n",[586,979,980,996,1024],{"__ignoreMap":600},[604,981,982,984,986,988,990,992,994],{"class":606,"line":607},[604,983,649],{"class":648},[604,985,652],{"class":618},[604,987,655],{"class":614},[604,989,619],{"class":658},[604,991,661],{"class":618},[604,993,664],{"class":614},[604,995,667],{"class":614},[604,997,998,1000,1002,1004,1006,1009,1011,1013,1015,1018,1020,1022],{"class":606,"line":638},[604,999,709],{"class":673},[604,1001,677],{"class":614},[604,1003,680],{"class":618},[604,1005,683],{"class":614},[604,1007,1008],{"class":631},"\u002Fapi\u002Fdashboard\u002F**",[604,1010,683],{"class":614},[604,1012,664],{"class":614},[604,1014,628],{"class":614},[604,1016,1017],{"class":631},"\u002Fapi\u002Faccount\u002F**",[604,1019,683],{"class":614},[604,1021,700],{"class":618},[604,1023,703],{"class":614},[604,1025,1026,1028],{"class":606,"line":645},[604,1027,744],{"class":614},[604,1029,747],{"class":618},[583,1031,1032,1034,1035,1037,1038,1041,1042,1045,1046,1048,1049,1051],{},[586,1033,829],{}," and ",[586,1036,809],{}," use glob patterns (",[586,1039,1040],{},"*",", ",[586,1043,1044],{},"**","). Provide both if you need granular control, and ",[586,1047,809],{}," wins over ",[586,1050,829],{},".",[763,1053,1055],{"id":1054},"react-to-identification","React to identification",[583,1057,1058,1059,1061],{},"Use ",[586,1060,848],{}," to react to user identification, for example to force-keep logs for premium users via tail sampling:",[594,1063,1065],{"className":596,"code":1064,"filename":598,"language":599,"meta":600,"style":600},"const identify = createAuthMiddleware(auth, {\n  onIdentify: (log, session) => {\n    if (session.user.plan === 'enterprise') {\n      log.set({ _forceKeep: true })\n    }\n  },\n  onAnonymous: (log) => {\n    log.set({ anonymous: true })\n  },\n})\n",[586,1066,1067,1083,1110,1146,1173,1178,1183,1200,1225,1230],{"__ignoreMap":600},[604,1068,1069,1071,1073,1075,1077,1079,1081],{"class":606,"line":607},[604,1070,649],{"class":648},[604,1072,652],{"class":618},[604,1074,655],{"class":614},[604,1076,619],{"class":658},[604,1078,661],{"class":618},[604,1080,664],{"class":614},[604,1082,667],{"class":614},[604,1084,1085,1088,1090,1093,1097,1099,1102,1105,1108],{"class":606,"line":638},[604,1086,1087],{"class":658},"  onIdentify",[604,1089,677],{"class":614},[604,1091,1092],{"class":614}," (",[604,1094,1096],{"class":1095},"sHdIc","log",[604,1098,664],{"class":614},[604,1100,1101],{"class":1095}," session",[604,1103,1104],{"class":614},")",[604,1106,1107],{"class":648}," =>",[604,1109,667],{"class":614},[604,1111,1112,1115,1117,1120,1122,1125,1127,1130,1133,1135,1138,1140,1143],{"class":606,"line":645},[604,1113,1114],{"class":610},"    if",[604,1116,1092],{"class":673},[604,1118,1119],{"class":618},"session",[604,1121,1051],{"class":614},[604,1123,1124],{"class":618},"user",[604,1126,1051],{"class":614},[604,1128,1129],{"class":618},"plan",[604,1131,1132],{"class":614}," ===",[604,1134,628],{"class":614},[604,1136,1137],{"class":631},"enterprise",[604,1139,683],{"class":614},[604,1141,1142],{"class":673},") ",[604,1144,1145],{"class":614},"{\n",[604,1147,1148,1151,1153,1156,1159,1162,1165,1167,1169,1171],{"class":606,"line":670},[604,1149,1150],{"class":618},"      log",[604,1152,1051],{"class":614},[604,1154,1155],{"class":658},"set",[604,1157,1158],{"class":673},"(",[604,1160,1161],{"class":614},"{",[604,1163,1164],{"class":673}," _forceKeep",[604,1166,677],{"class":614},[604,1168,736],{"class":735},[604,1170,622],{"class":614},[604,1172,747],{"class":673},[604,1174,1175],{"class":606,"line":706},[604,1176,1177],{"class":614},"    }\n",[604,1179,1180],{"class":606,"line":727},[604,1181,1182],{"class":614},"  },\n",[604,1184,1185,1188,1190,1192,1194,1196,1198],{"class":606,"line":741},[604,1186,1187],{"class":658},"  onAnonymous",[604,1189,677],{"class":614},[604,1191,1092],{"class":614},[604,1193,1096],{"class":1095},[604,1195,1104],{"class":614},[604,1197,1107],{"class":648},[604,1199,667],{"class":614},[604,1201,1203,1206,1208,1210,1212,1214,1217,1219,1221,1223],{"class":606,"line":1202},8,[604,1204,1205],{"class":618},"    log",[604,1207,1051],{"class":614},[604,1209,1155],{"class":658},[604,1211,1158],{"class":673},[604,1213,1161],{"class":614},[604,1215,1216],{"class":673}," anonymous",[604,1218,677],{"class":614},[604,1220,736],{"class":735},[604,1222,622],{"class":614},[604,1224,747],{"class":673},[604,1226,1228],{"class":606,"line":1227},9,[604,1229,1182],{"class":614},[604,1231,1233,1235],{"class":606,"line":1232},10,[604,1234,744],{"class":614},[604,1236,747],{"class":618},[583,1238,1239,1240,1242,1243,1245,1246,1248],{},"Hooks fire after the session is resolved and ",[586,1241,591],{}," has set its fields. They run on every request that passes the ",[586,1244,829],{},"\u002F",[586,1247,809],{}," filter, so keep them fast and side-effect-free.",[1250,1251,1252,1257],"tip",{},[583,1253,1254,1255,677],{},"Common patterns for ",[586,1256,848],{},[1258,1259,1260,1264,1267],"ul",{},[1261,1262,1263],"li",{},"Force-keep audit logs for admins or high-value plans.",[1261,1265,1266],{},"Tag the request with feature flags or tenant info loaded from the session.",[1261,1268,1269],{},"Increment a per-user counter for billing.",[763,1271,1273],{"id":1272},"what-happens-when-auth-fails","What happens when auth fails",[583,1275,1276,1277,1280,1281,1034,1283,1286],{},"The middleware catches every error from ",[586,1278,1279],{},"getSession"," and logs nothing, so your request keeps flowing whether the auth backend is up or down. The wide event still includes ",[586,1282,760],{},[586,1284,1285],{},"auth.identified: false"," so you can alert on session resolution health from your dashboards.",[1288,1289,1290],"style",{},"html pre.shiki code .s7zQu, html code.shiki .s7zQu{--shiki-light:#39ADB5;--shiki-light-font-style:italic;--shiki-default:#89DDFF;--shiki-default-font-style:italic;--shiki-dark:#89DDFF;--shiki-dark-font-style:italic}html pre.shiki code .sMK4o, html code.shiki .sMK4o{--shiki-light:#39ADB5;--shiki-default:#89DDFF;--shiki-dark:#89DDFF}html pre.shiki code .sTEyZ, html code.shiki .sTEyZ{--shiki-light:#90A4AE;--shiki-default:#EEFFFF;--shiki-dark:#BABED8}html pre.shiki code .sfazB, html code.shiki .sfazB{--shiki-light:#91B859;--shiki-default:#C3E88D;--shiki-dark:#C3E88D}html pre.shiki code .spNyl, html code.shiki .spNyl{--shiki-light:#9C3EDA;--shiki-default:#C792EA;--shiki-dark:#C792EA}html pre.shiki code .s2Zo4, html code.shiki .s2Zo4{--shiki-light:#6182B8;--shiki-default:#82AAFF;--shiki-dark:#82AAFF}html pre.shiki code .swJcz, html code.shiki .swJcz{--shiki-light:#E53935;--shiki-default:#F07178;--shiki-dark:#F07178}html pre.shiki code .sfNiH, html code.shiki .sfNiH{--shiki-light:#FF5370;--shiki-default:#FF9CAC;--shiki-dark:#FF9CAC}html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html.dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html pre.shiki code .sHwdD, html code.shiki .sHwdD{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#546E7A;--shiki-default-font-style:italic;--shiki-dark:#676E95;--shiki-dark-font-style:italic}html pre.shiki code .sHdIc, html code.shiki .sHdIc{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#EEFFFF;--shiki-default-font-style:italic;--shiki-dark:#BABED8;--shiki-dark-font-style:italic}",{"title":600,"searchDepth":638,"depth":638,"links":1292},[1293,1294,1295,1296],{"id":765,"depth":638,"text":346},{"id":882,"depth":638,"text":883},{"id":1054,"depth":638,"text":1055},{"id":1272,"depth":638,"text":1273},"Framework-agnostic factory with route filtering, session timing, and lifecycle hooks. Call it once at startup and reuse across requests.","md",[1300,1303],{"label":369,"icon":372,"to":370,"color":1301,"variant":1302},"neutral","subtle",{"label":383,"icon":112,"to":384,"color":1301,"variant":1302},{},{"title":374,"icon":377},{"title":578,"description":1297},"W5iPJDKIMXykmBxrqRGnyCbSUGNKZLZjNw0Sw3TEzU0",[1309,1311],{"title":369,"path":370,"stem":371,"description":1310,"icon":372,"children":-1},"The core building block — extract safe user fields, mask emails, and capture plugin data (organizations, roles, 2FA) from a Better Auth session.",{"title":379,"path":380,"stem":381,"description":1312,"icon":330,"children":-1},"Mirror the server-side user identity into client-side logs by watching the Better Auth session and calling setIdentity.",1790280235292]