Echo — Wrong Method

This endpoint expects POST, not GET.

To submit data, use an HTML <form method="POST"> or send a POST request from your code.

A quick comparison of when each request method is appropriate.
GET	POST
Reading or fetching data	Submitting or changing data
Data visible in the URL	Data sent in the request body
Bookmarkable and shareable	Not bookmarkable
Best for non-sensitive info	Best for passwords and personal data
Examples: search, filters	Examples: login, this form