fix invalid method reference

C. Fahner <christiaanenzo@gmail.com>
fix ApiCall name being empty string when omitting namespace

C. Fahner <christiaanenzo@gmail.com>
fix incorrect userId assignment during session authentication

C. Fahner <christiaanenzo@gmail.com>
add shorthand method usage for UserService

C. Fahner <christiaanenzo@gmail.com>
fix users not being added using addUser

C. Fahner <christiaanenzo@gmail.com>
fix broken query for finding users by id

C. Fahner <christiaanenzo@gmail.com>
add permission_grant ApiCall

C. Fahner <christiaanenzo@gmail.com>
add ApiCall permission_revoke

C. Fahner <christiaanenzo@gmail.com>