PATCH and DELETE methods - HTTP Requests problem

Hello ! I'm posting here today because I got a little problem.

I have to make a Login menu in Unity. There is already an API, that I didn't make, I just have to send requests from Unity and analyze the responses.

GET method is used to authenticate :

GET /api/auth * Request - first authentication (without token) - <mail> : (string) email address - <password> : (string) password

I can use WWW class that supports GET method :

     IEnumerator Auth(){
         string url = "127.0.0.1/api/auth?mail=" + mail + "&password=" + password;
 
         WWW www = new WWW(url);
 
         yield return www;
 
         if (!string.IsNullOrEmpty(www.error)){
             Debug.Log(www.error);
         } else {
             Debug.Log(www.text);
         }
     }

Tha't s working perfectly.

To request a new pass, POST Method :

POST /api/passwordRenewal * Request - <mail> : email address

I can use WWW class too :

     IEnumerator ResetPass(){
         string url = "127.0.0.1/api/passwordRenewal";
 
         WWWForm form = new WWWForm();
 
         form.AddField("mail", mail);
 
         WWW www = new WWW(url, form);
 
         yield return www;
         
         if (!string.IsNullOrEmpty(www.error)){
             Debug.Log(www.error);
         } else {
             Debug.Log(www.text);
         }
     }

That's working perfectly too.

Here is my problem :

To change the password, PATCH method is used :

PATCH /api/auth * Request - <new_pw> : (string) new password - <old_token> : (string) current token

But not supported by WWW class, so I searched and tried to use WebRequest class :

     public void ChangePass(){
         string json = JsonUtility.ToJson(infos); // infos contains new_pw and old_token
 
         WebRequest request = WebRequest.Create ("http://127.0.0.1/api/auth");  
         request.Method = "PATCH"; 
         byte[] byteArray = Encoding.UTF8.GetBytes (json);  
         request.ContentType = "application/json";  
         request.ContentLength = byteArray.Length;  
 
         Stream dataStream = request.GetRequestStream ();   
         dataStream.Write (byteArray, 0, byteArray.Length);   
         dataStream.Close ();  
 
         WebResponse response = request.GetResponse ();  
         Debug.Log(((HttpWebResponse)response).StatusDescription); 
 
         dataStream = response.GetResponseStream ();  
         StreamReader reader = new StreamReader (dataStream);  
         string responseFromServer = reader.ReadToEnd ();   
         Debug.Log(responseFromServer);  
 
         reader.Close ();  
         dataStream.Close ();  
         response.Close ();  
     }

But I got a Bad Request (400), I don't really know how to use the PATCH method

And to Logout, the DELETE method is used :

DELETE /api/auth * Request - <token> : (string) token

Here again I tried to use WebRequest class, but I don't know how to give the "token" information, I tried to "send it" but I got an error like "Can't send data with DELETE"

And with the following code :

     public void Logout(){
         string url = "http://127.0.0.1/api/auth";
 
         WebRequest request = WebRequest.Create(url);
         request.Method = "DELETE";
 
         WebResponse response = request.GetResponse();
     }

I got a bad request (400) I tried to pass the token in the url (?token=xxx)

It still don't work.

I never tried to send Http requests, and I don't know a lot about this, so I maybe missed important things ?

If someone knows how I can solve my problem, that would be great !

(I'm new to c#, I started to use it 3 months ago when I started to use Unity ..)

Thank you for your time !