Add default user to allow for default groups and IAM

app/models/auth/User.model.js

@@ -40,9 +40,24 @@ class User extends AuthUser {
             notify_config: NotifyConfig,
             uid_number: Number,
             login_shell: String,
+
+            is_default_user_for_coreid: { type: Boolean, default: false },
         }}
     }
 
+    async grant_defaults() {
+        const default_user = await this.constructor.findOne({is_default_user_for_coreid: true, active: true})
+        this.login_shell = default_user.login_shell
+        this.roles = default_user.roles
+        this.permissions = default_user.permissions
+
+        const groups = await default_user.groups()
+        for ( const group of groups ) {
+            group.user_ids.push(this.id)
+            await group.save()
+        }
+    }
+
     async get_uid_number() {
         if ( !this.uid_number ) {
             const Setting = this.models.get('Setting')