Completes invitation process for an OIDC user initiated by the
Completes invitation process for an OpenIdConnect user created by Bluemix Unified User Console.
|verificationCode||string||: invitation code used to create the user|
|userInfo||SoftLayer_User_Customer||: user object fields to be updated|
|iamId||string||Fully qualified (realm-id format) IAMid for the user (optional)|
Throw the exception “Error completing activation.” if there was an error completing activation.