response_type: (required, the tool must use a value of id_token)
redirect_uri:
response_mode: (required, tools and platforms must support a value of form_post)
client_id: 16a7fb55-eab5-4d11-b753-470ebf1f9ecb (required, client identifier valid at the Platform)
scope: (required, must contain the openid scope value)
state: (required, opaque value used to maintain state between the request and the callback)
login_hint: 484710 (required, tools and platforms must support a value of form_post)
lti_message_hint: 67201 (required, a platform opaque identifier identifying the user to login)
prompt: (optional, The tool should use a value of none. In the future a re-launch flow may support additional values being used here)
nonce: (optional, string value used to associate a client session with an ID token, and to mitigate replay attacks)