Update readme

Author: rappasoft

README.md

@@ -109,7 +109,11 @@ Get the user's last login information:
 ```php
 User::find(1)->lastLoginAt();
 
+User::find(1)->lastSuccessfulLoginAt();
+
 User::find(1)->lastLoginIp();
+
+User::find(1)->lastSuccessfulLoginIp();
 ```
 
 Get the user's previous login time & IP address (ignoring the current login):

src/Traits/AuthenticationLoggable.php

@@ -21,11 +21,21 @@ public function lastLoginAt()
         return optional($this->authentications()->first())->login_at;
     }
 
+    public function lastSuccessfulLoginAt()
+    {
+        return optional($this->authentications()->whereLoginSuccessful(true)->first())->login_at;
+    }
+
     public function lastLoginIp()
     {
         return optional($this->authentications()->first())->ip_address;
     }
 
+    public function lastSuccessfulLoginIp()
+    {
+        return optional($this->authentications()->whereLoginSuccessful(true)->first())->ip_address;
+    }
+
     public function previousLoginAt()
     {
         return optional($this->authentications()->skip(1)->first())->login_at;