How to obtain an access token for accessing LTI Advantage Services?

Steve.Hellauer17

I am receiving the following error:

{"error":"invalid_client","error_description":"Missing client"}

 

My curl headers are set:

--request POST 

--header "Authorization: Basic B64 Encoded clientID:client secret (this is missing!)"

--header "Content-Type: application/x-www-form-urlencoded"

 

My URL is set:

https://auth.brightspace.com/core/connect/token?grant_type=client_credentials&client_assertion_type=urn:ietf:params:oauth:client-assertion-type:jwt-bearer&scope=https://purl.imsglobal.org/spec/lti-ags/scope/score https://purl.imsglobal.org/spec/lti-nrps/scope/contextmembership.readonly https://purl.imsglobal.org/spec/lti-ags/scope/lineitem&client_assertion=JWTGOESHERE&redirect_uri=https://testing.com

 

When registering an LTI Advantage Tool, I cannot find the client secret. It only provides the following registration details:

 

• Client Id
• Brightspace Keyset URL
• Brightspace OAuth2 Access Token URL
• OpenId Connect Authentication Endpoint
• Brightspace OAuth2 Audience
• Issuer