2248567d_onnect_Messages_1_0___draft_14__Member
[Type] string [Description] Shorthand name that the End-User wishes to be referred to at the RP, such as janedoe or j.doe. This value MAY be any valid JSON string including special characters such as @, /, or whitespace. This value MUST NOT be relied upon to be unique by the RP. (See Section 2.4.2 (Claim Stability and Uniqueness).) [Member] 
preferred_username
Draft: OpenID Connect Messages 1.0 - draft 14