oAuth2 Script To Pull Back Token

[fcaruso123]

I've created a REST Message using an oAuth profile. Using the Get OAuth Token link I am able to successfully pull back a token. Am now trying to script the same call in a business rule. I've read many articles and tried several variations but am not able to pull back a token. The oAuth profile uses a Grant Type of "Client Credentials. I'm in Global scope. At this point I am confused about the difference between GlideOAuthClientRequest() and GlideOAuthClient, which to use and what parameters to pass. Example scripts talk about oauth_profile_id and oath_entity_id but it s not clear if those are sys_id values or something else. Currently using the following:

           var oauth_profile_id = 'c4600d06ebb0821023a9fd59bad0cd43';
            var params = {grant_type:"Client Credentials",oauth_provider_profile:oauth_profile_id};
            var json = new global.JSON();
            var text = json.encode(params);

            var oAuthClient = new sn_auth.GlideOAuthClient();

            try {
            	var tokenResponse = oAuthClient.requestToken('Test');
            	var token = tokenResponse.getToken();
            	var access_token = token.getAccessToken();
            } catch(ex) {
            	alert ('asasasas');
            }

Any advice is appreciated.

[fcaruso123 · Accepted solution]

I found my mistake. I was using "Client Credentials" instead of "client_credentials". New code works to obtain token and make API call:

    var params = {
        grant_type: "client_credentials",
        oauth_provider_profile: "c4600d06ebb0821023a9fd59bad0cd43"
    };
    var json = new global.JSON();
    var text = json.encode(params);
    var oAuthClient = new GlideOAuthClient();

    try {
        var tokenResponse = oAuthClient.requestToken('Test', text);
        var token = tokenResponse.getToken();
        var access_token = token.getAccessToken();

	var r = new sn_ws.RESTMessageV2('Action', 'Create Ticket');
	r.setRequestHeader('Authorization',access_token);
	r.setRequestHeader('Content-Type','application/json');
	var response = r.execute();
	current.u_string_1 = response.getBody();
	current.u_string_1 += '\n' + token.getExpiresIn();
    } catch (ex) {
        alert('asasasas');
    }