diff --git a/app/lib/warden/email_and_password/strategy.rb b/app/lib/warden/email_and_password/strategy.rb
index 3586f9e..e32c1f3 100644
--- a/app/lib/warden/email_and_password/strategy.rb
+++ b/app/lib/warden/email_and_password/strategy.rb
@@ -19,14 +19,14 @@ module Warden
       # Autentica a una posible invitadx, no fallamos para que haya
       # fallback con IMAP
       def authenticate!
-        u = Invitadx.find_by_email(params['username'])
+        u = ::Invitadx.find_by_email(params['username'])
 
-        if u.try(:authenticate, params['password'])
-          if u.confirmed?
-            success! u
-          else
-            fail! 'unconfirmed'
-          end
+        return unless u.try(:authenticate, params['password'])
+
+        if u.confirmed?
+          success! u
+        else
+          fail! 'unconfirmed'
         end
       end
     end
diff --git a/app/lib/warden/imap/strategy.rb b/app/lib/warden/imap/strategy.rb
index 87ade2e..7e9d6df 100644
--- a/app/lib/warden/imap/strategy.rb
+++ b/app/lib/warden/imap/strategy.rb
@@ -46,7 +46,7 @@ module Warden
         @imap.login(@email.normal, params['password'])
         @imap.disconnect
 
-        success! Usuaria.find(@email.normal)
+        success! ::Usuaria.find(@email.normal)
       rescue Net::IMAP::NoResponseError, EOFError => e
         @imap.disconnect
         Rails.logger.error e.to_s