How to Add User A to Given MUC created by another User B

[mahmadmujtaba]

MongooseIM version: 6.2.1

Installed from: Official Docker

Erlang/OTP version: 25

Not able to modify User Affiliation to a MUC.
Steps to reproduce:

Create a Users A, B: (OK) as Admin User

mutation register_user {
	account {
		registerUser(
			domain: "DOMAIN"
			password: "PASSWORD"
			username: "USER-A/USER-B"
		) {
			jid
			message
		}
	}
}

Create a MUC: (OK) as User B

mutation create_room {
  muc {
    createInstantRoom(
      nick: "USERNICK",
      room: "[email protected]"
    ) {
      jid
      title
      private
      usersNumber
    }
  }
}

Update MUC properties: (OK) as User B

mutation change_room_configuration {
	muc {
		changeRoomConfiguration(
			room: "[email protected]"
			config: {
				title: "TITLE"
				description: "DESCRIPTION"
				allowChangeSubject: true
				allowQueryUsers: true
				allowPrivateMessages: true
				allowVisitorStatus: true
				allowVisitorNickchange: true
				public: true
				publicList: true
				persistent: true
				moderated: false
				membersByDefault: true
				membersOnly: false
				allowUserInvites: true
				allowMultipleSession: true
				passwordProtected: false
				password: null
				anonymous: false
				mayGetMemberList: ["member"]
				maxUsers: 30
				logging: true
			}
		) {
			title
			description
			allowChangeSubject
			allowQueryUsers
			allowPrivateMessages
			allowVisitorStatus
			allowVisitorNickchange
			public
			publicList
			persistent
			moderated
			membersByDefault
			membersOnly
			allowUserInvites
			allowMultipleSession
			passwordProtected
			password
			anonymous
			mayGetMemberList
			maxUsers
			logging
		}
	}
}

Add User A to MUC with Affiliation as MEMBER: (NOT WORKING)

# called from GraphiQL with auth of User B within Request params (DOES NOT WORK)
# called from GraphiQL with auth of Admin within Request params (DOES NOT WORK)
mutation muc {
  muc {
    setUserAffiliation(
      affiliation: MEMBER,
      room: "[email protected]",
      user: "user-a@localhost"
    )
  }
}

Error details:

{
  "errors": [
    {
      "path": [
        "muc",
        "setUserAffiliation"
      ],
      "message": "Given user does not have permission to set the member affiliation",
      "extensions": {
        "room": "[email protected]",
        "code": "not_allowed"
      }
    }
  ],
  "data": {
    "muc": {
      "setUserAffiliation": null
    }
  }
}