Update README.md

Author: DanielFillol

README.md

@@ -154,3 +154,6 @@ Return: ```status 200```
 - [MySQL - GORM](https://github.com/go-gorm/mysql)
 - [GO.ENV](https://github.com/joho/godotenv)
 - [JWT](https://github.com/golang-jwt/jwt)
+
+## Extra
+If you're interested in checking out my API caller, you can find it by clicking on this [link](https://github.com/DanielFillol/API_Caller)