This string includes the properties used to connect with bearer token authentication. 

jdbc:datadirect:github:ServerName=server_name;
SecurityToken=security_token;[property=value[;...]];

where:

server_name
specifies the base URL of the GitHub service to which you want to issue requests. For example, https://github.enterprise.com for enterprise accounts.
Note: Specifying an HTTPS URL for this property enables data encryption.
security_token
specifies the personal access token assigned to you.
property=value
specifies connection property settings. Multiple properties are separated by a semi-colon.

The following example shows how to establish a connection to a GitHub service:

Connection conn = DriverManager.getConnection
  ("jdbc:datadirect:github:ServerName=github.enterprise.com;
    SecurityToken=12a3=bCD/EfGh4Ijk+Lgd8g-44tk3c527831;");