fix: updated handlers to use new DecodeJSON generic function

internal/api/request/user.go

@@ -1,26 +1,7 @@
 package request
 
-import (
-	"encoding/json"
-	"fmt"
-	"net/http"
-)
-
 type CreateUserPayload struct {
 	Email    string `json:"email"`
 	Name     string `json:"name"`
 	Password string `json:"password"`
 }
-
-func DecodeCreateUser(r *http.Request) (CreateUserPayload, error) {
-	var payload CreateUserPayload
-
-	decoder := json.NewDecoder(r.Body)
-	decoder.DisallowUnknownFields()
-
-	if err := decoder.Decode(&payload); err != nil {
-		return payload, fmt.Errorf("error decoding create user payload: %w", err)
-	}
-
-	return payload, nil
-}