If you are getting invalid credentials, the Local AAA user has not been set up properly, or you have the wrong credentials or parameters in your properties file for the Local AAA adapter.
Check to see if the user and password for Local AAA is valid:
mongo -u localaaa_user -p pronghorn LocalAAA
show users....
If you are logged in and can see the configured users, check the Local AAA adapter properties to verify they are set correctly. The same also applies to pronghorn if Itential Platform does not come up; be sure the pronghorn user and password are valid in the properties.json file and in the adapter properties for MongoDB.