405 error when redirecting webpage with echo

I am currently writing the sign up and login methods for a side project I am working on and whenever I get my backend to redirect the user I receive a 405 error
{"message":"Method Not Allowed"}

I am curious of why this is happening and how could I fix it? Here is my code, I am using the echo web framework for go.

Within both methods, if all goes well I call the method c.Redirect(http.StatusOK, "path") (where c is the echo context package)

Within my signup.html file I have this simple form submission:

<form method="post">
  <input type="text" name="username" placeholder="username">
  <input type="text" name="password" placeholder="password">
  <input type="submit">
</form>

Yet I continue to receive the error.

Quite straight forward, all help is appreciated!