fix(providers): migrate GitLab provider to TS (#4929)

Author: yoannfleurydev

packages/next-auth/src/providers/gitlab.js

@@ -0,0 +1,72 @@
+import type { OAuthConfig, OAuthUserConfig } from "."
+
+export interface GitLabProfile extends Record<string, any> {
+  id: number
+  username: string
+  email: string
+  name: string
+  state: string
+  avatar_url: string
+  web_url: string
+  created_at: string
+  bio: string
+  location?: string
+  public_email: string
+  skype: string
+  linkedin: string
+  twitter: string
+  website_url: string
+  organization: string
+  job_title: string
+  pronouns: string
+  bot: boolean
+  work_information?: string
+  followers: number
+  following: number
+  local_time: string
+  last_sign_in_at: string
+  confirmed_at: string
+  theme_id: number
+  last_activity_on: string
+  color_scheme_id: number
+  projects_limit: number
+  current_sign_in_at: string
+  identities: Array<{
+    provider: string
+    extern_uid: string
+  }>
+  can_create_group: boolean
+  can_create_project: boolean
+  two_factor_enabled: boolean
+  external: boolean
+  private_profile: boolean
+  commit_email: string
+  shared_runners_minutes_limit: number
+  extra_shared_runners_minutes_limit: number
+}
+
+export default function GitLab<P extends GitLabProfile>(
+  options: OAuthUserConfig<P>
+): OAuthConfig<P> {
+  return {
+    id: "gitlab",
+    name: "GitLab",
+    type: "oauth",
+    authorization: {
+      url: "https://gitlab.com/oauth/authorize",
+      params: { scope: "read_user" },
+    },
+    token: "https://gitlab.com/oauth/token",
+    userinfo: "https://gitlab.com/api/v4/user",
+    checks: ["pkce", "state"],
+    profile(profile) {
+      return {
+        id: profile.id.toString(),
+        name:  profile.name ?? profile.username,
+        email: profile.email,
+        image: profile.avatar_url,
+      }
+    },
+    options,
+  }
+}