[PD2] Gateway login, logout and auth middleware done.

Co-authored-by: tsousa111 <tiagao2001@hotmail.com>

Projs/PD2/internal/protocol/protocol.go

@@ -53,10 +53,16 @@ type (
 	}
 
 	PostRegister struct {
+		UID         string `json:"uid"`
 		Password    string `json:"password"`
 		Certificate []byte `json:"certificate"`
 	}
 
+	PostLogin struct {
+		UID         string `json:"uid"`
+		Password    string `json:"password"`
+	}
+
 	ReportError struct {
 		ErrorMessage string `json:"error"`
 	}
@@ -107,6 +113,21 @@ func NewMsgInfo(num int, fromUID string, subject []byte, timestamp time.Time) Ms
 	}
 }
 
+func NewPostRegister(UID string,Password string,Certificate []byte) PostRegister {
+    return PostRegister{
+        UID: UID,
+        Password: Password,
+        Certificate: Certificate,
+    }
+}
+
+func NewPostLogin(UID string,Password string) PostLogin {
+    return PostLogin{
+        UID: UID,
+        Password: Password,
+    }
+}
+
 func NewAnswerGetMsg(fromUID, toUID string, subject []byte, body []byte, timestamp time.Time, last bool) AnswerGetMsg {
 	return AnswerGetMsg{
 		FromUID:   fromUID,