Script include used as part of secret server discovery integration. Inspired by https://joscor.com/blog/servicenow-thycotic-secret-server/

SecretServer.js

var SecretServer = Class.create();
SecretServer.prototype = {

    initialize: function() {
	
        
		this.BASE_URL = 'https://mySecretServer/SecretServer'; //temp change due to load balanced URL being down
		this.AUTH_PROFILE = 'SYSID'; //sys_id of basic auth profile
		this.TOKEN_CRED = this._getCredential(this.AUTH_PROFILE); //Glide Record of auth Profile
        this.ACCESS_TOKEN = ''; //Holder for Access Token
        this.GRANTJSON = 'SYSID'; //sys_id of oauth2_grant.json script file
        this.MID = this._getMid(); // Get mid server to use for request
    },


    /*** Description: return access Token.
     * Parameters: encrPass - encrypted password
     * Returns: string */
    getAccessToken: function() {
        try {

            var client = new sn_ws.RESTMessageV2();
            client.setHttpMethod('post');
            client.setEndpoint(this.BASE_URL + '/oauth2/token');
            client.setEccParameter("skip_sensor", "true"); // prevent Discovery sensors running for the ECC input
            client.setRequestHeader('Content-Type',
                'application/x-www-form-urlencoded');
            client.setRequestBody('username=' + this.TOKEN_CRED.username.toString() +
                '&password=' + this._getDecryptedPassword(this.TOKEN_CRED.password.toString()) +
                '&grant_type=password');
            client.setHttpTimeout(10000);
            client.setMIDServer(this.MID);
            // Make request, decode JSON response, and return the access token
            this.ACCESS_TOKEN = (JSON.parse(client.execute().getBody())).access_token;
        } catch (ex) {
            gs.error('Exception: (' + ex + '), ' + ex.getMessage());

        }
        return this;
    },

    updateScriptFile: function() {
        if (JSUtil.nil(this.ACCESS_TOKEN)) {
            return;
        }
        var grSF = new GlideRecord('ecc_agent_script_file');
        grSF.get(this.GRANTJSON);
        grSF.setValue('script', this.ACCESS_TOKEN);
        grSF.update();
        return this;

    },

    /*** Description: Get credential record
     * Parameters: credID - sys_id of credential
     * Returns: Credential GlideRecord */
    _getCredential: function(credID) {
        if (JSUtil.nil(credID)) {
            return;
        }
        var grCred = new GlideRecord('sys_auth_profile_basic');
        return grCred.get(credID) ? grCred : null;
    },

    /*** Description: return deccrypted password
     * Parameters: encrPass - encrypted password
     * Returns: string */
    _getDecryptedPassword: function(encrPass) {
        if (JSUtil.nil(encrPass)) {
            return;
        }
        return new GlideEncrypter().decrypt(encrPass);
    },

    /*** Description: find available mid server to use for request
     * Parameters: 
     * Returns: sys_id of mid */
    _getMid: function() {
        var grMid = new GlideRecord('ecc_agent_application_m2m');
        grMid.addEncodedQuery('application=35aa573fd7802200bdbaee5b5e610375^ORapplication=b5f91a57d7002200bdbaee5b5e6103ec^agent.status=Up');
        grMid.setLimit(1);
        grMid.query();
        grMid.next();
        return grMid.agent.name.toString();
    },


    type: 'SecretServer'
};