Name & roles provisioning service (proctoring launch)

key	Value	Default	Description
`context_memberships_url`	`URL`	none	The NRPS endpoint that will send the attendance list for the given context in the `Not Started` tab.
`service_versions`	`2.0`	-	For more information, see https://www.imsglobal.org/spec/lti-nrps/v2p0.

Example:

"https://purl.imsglobal.org/spec/lti-nrps/claim/namesroleservice": {
    "context_memberships_url": "https://www.myuniv.example.com/2344/memberships",
    "service_versions": ["2.0"]
  }