/**
 * @schema AdminUpdateUser
 * type: object
 * description: The properties to update in a user.
 * x-schemaName: AdminUpdateUser
 * properties:
 *   first_name:
 *     type: string
 *     title: first_name
 *     description: The user's first name.
 *   last_name:
 *     type: string
 *     title: last_name
 *     description: The user's last name.
 *   avatar_url:
 *     type: string
 *     title: avatar_url
 *     description: The URL of the user's avatar.
 * 
*/