[minor] added a login command

lib/jitsu.js

@@ -50,6 +50,7 @@ jitsu.commands.alias('create', { resource: 'apps',   command: 'create' });
 jitsu.commands.alias('deploy', { resource: 'apps',   command: 'deploy' });
 jitsu.commands.alias('list',   { resource: 'apps',   command: 'list' });
 jitsu.commands.alias('conf',   { resource: 'config', command: 'list' });
+jitsu.commands.alias('login',  { resource: 'users',  command: 'login' });
 jitsu.commands.alias('logout', { resource: 'users',  command: 'logout' });
 jitsu.commands.alias('signup', { resource: 'users',  command: 'create' });
 
@@ -195,7 +196,16 @@ jitsu.auth = function (callback) {
 //
 jitsu.setupUser = function (callback) {
   winston.warn('No user has been setup on this machine');
+  jitsu.setupUserNoWarn(callback);
+};
 
+//
+// ### function setupUserNoWarn (callback)
+// #### @callback {function} Continuation to pass control to when complete.
+// Prompts the user for their username / password combo, then sets up the jitsu CLI,
+// and saves the resulting configuration to disk without a warning
+//
+jitsu.setupUserNoWarn = function(callback) {
   //
   // Attempt to get the password three times.
   //

lib/jitsu/commands/users.js

@@ -223,3 +223,7 @@ users.forgot.usage = [
   '',
   'jitsu users forgot <username>'
 ];
+
+users.login = function(callback) {
+  jitsu.setupUserNoWarn(callback);
+}