Create user record automatically when someone logs in on the website

Now that we are moving out of the private alpha, we should let everyone
in when they try to log into zed.dev.

crates/collab/src/api.rs

@@ -78,6 +78,7 @@ pub async fn validate_api_token<B>(req: Request<B>, next: Next<B>) -> impl IntoR
 struct AuthenticatedUserParams {
     github_user_id: Option<i32>,
     github_login: String,
+    github_email: Option<String>,
 }
 
 #[derive(Debug, Serialize)]
@@ -92,7 +93,11 @@ async fn get_authenticated_user(
 ) -> Result<Json<AuthenticatedUserResponse>> {
     let user = app
         .db
-        .get_user_by_github_account(&params.github_login, params.github_user_id)
+        .get_or_create_user_by_github_account(
+            &params.github_login,
+            params.github_user_id,
+            params.github_email.as_deref(),
+        )
         .await?
         .ok_or_else(|| Error::Http(StatusCode::NOT_FOUND, "user not found".into()))?;
     let metrics_id = app.db.get_user_metrics_id(user.id).await?;
@@ -297,11 +302,7 @@ async fn create_access_token(
     let mut user_id = user.id;
     if let Some(impersonate) = params.impersonate {
         if user.admin {
-            if let Some(impersonated_user) = app
-                .db
-                .get_user_by_github_account(&impersonate, None)
-                .await?
-            {
+            if let Some(impersonated_user) = app.db.get_user_by_github_login(&impersonate).await? {
                 user_id = impersonated_user.id;
             } else {
                 return Err(Error::Http(