feat(otter): cli command to toggle admin status

gpodder/src/repository/mod.rs

@@ -83,6 +83,10 @@ impl GpodderRepository {
         self.store.insert_user(username, &password_hash)
     }
 
+    pub fn update_user(&self, user: models::User) -> Result<models::User, AuthErr> {
+        self.store.update_user(user)
+    }
+
     pub fn validate_credentials(
         &self,
         username: &str,

gpodder/src/store.rs

@@ -51,6 +51,9 @@ pub trait GpodderAuthStore {
     /// Insert a new user into the data store
     fn insert_user(&self, username: &str, password_hash: &str) -> Result<User, AuthErr>;
 
+    /// Update the user with the included ID with the new values
+    fn update_user(&self, user: User) -> Result<User, AuthErr>;
+
     /// Create a new session for a user with the given session ID
     ///
     /// The `last_seen` timestamp's precision should be at least accurate to the second