I am attempting to execute the following code, but every time I get the error message that the credentials are unrecognised.  The APIKey I am using the the APIKey associated with the administrator account.  I have also tried with the email address and password with the same effect. 

									client.request.get(
										"https://"+<<domain>>+"/api/v2/agents",
										{	headers: {
											"Content-Type": "applicationi/json",
											"Authorisation" :"Basic "+ btoa(`<<APIKey>>:X`)
										}}
									).then(
										function(data){
											Agents=data;
										}
										); 

Basically, I am after the list of agents and groups, which I have noticed is always loaded whenever a page is loaded, even for non-admin users.

i.e. https://<domain>>/api/_/bootstrap/agentGroups.

As this is available (via browser development tools), I'm not sure why there is no equivalent API available to Apps?