Client
In This Section:
- Initializing Client
 - authenticate(): client.authenticate()
 - authenticateUsingOauth(): client.authenticateUsingOauth()
 - signIn(): client.signIn()
 - signInWithApiKey...(): client.signInWithApiKeyAndSecret()
 - signOut(): client.signOut()
 - signOutAllDevices(): client.signOutAllDevices()