Show error if email already exists in signup

client/views/login/form.coffee

@@ -61,8 +61,16 @@ Template.loginForm.events
 				return
 
 			if instance.state.get() is 'register'
-				Meteor.call 'registerUser', formData, (err, result) ->
+				Meteor.call 'registerUser', formData, (error, result) ->
 					RocketChat.Button.reset(button)
+
+					if error?
+						if error.error is 'Email already exists.'
+							toastr.error t 'Email_already_exists'
+						else
+							toastr.error error.reason
+						return
+
 					Meteor.loginWithPassword formData.email, formData.pass, (error) ->
 						if error?.error is 'no-valid-email'
 							toastr.success t('We_have_sent_registration_email')

i18n/en.i18n.json

@@ -45,6 +45,7 @@
   "edited" : "edited",
   "Email_or_username" : "Email or username",
   "Email_verified" : "Email verified",
+  "Email_already_exists": "Email already exists",
   "Enter_info" : "Enter your login information",
   "Error_changing_password" : "Password changed",
   "Favorites" : "Favorites",

i18n/pt.i18n.json

@@ -43,6 +43,7 @@
   "edited" : "editado",
   "Email_or_username" : "Email ou nome de usuário",
   "Email_verified" : "Email verificado",
+  "Email_already_exists": "Email já cadastrado",
   "Enter_info" : "Entre com seus dados de login",
   "Error_changing_password" : "Senha alterada",
   "Favorites" : "Favoritos",