[MM-37772] Idiomatic naming (URL, URI, API) (#18128)

* s/Url/URL/g & s/Uri/URI/g

* s/Api/API/g

model/authorize.go

@@ -28,7 +28,7 @@ type AuthData struct {
 type AuthorizeRequest struct {
 	ResponseType string `json:"response_type"`
 	ClientId     string `json:"client_id"`
-	RedirectUri  string `json:"redirect_uri"`
+	RedirectURI  string `json:"redirect_uri"`
 	Scope        string `json:"scope"`
 	State        string `json:"state"`
 }
@@ -57,7 +57,7 @@ func (ad *AuthData) IsValid() *AppError {
 		return NewAppError("AuthData.IsValid", "model.authorize.is_valid.create_at.app_error", nil, "client_id="+ad.ClientId, http.StatusBadRequest)
 	}
 
-	if len(ad.RedirectUri) > 256 || !IsValidHTTPUrl(ad.RedirectUri) {
+	if len(ad.RedirectUri) > 256 || !IsValidHTTPURL(ad.RedirectUri) {
 		return NewAppError("AuthData.IsValid", "model.authorize.is_valid.redirect_uri.app_error", nil, "client_id="+ad.ClientId, http.StatusBadRequest)
 	}
 
@@ -84,7 +84,7 @@ func (ar *AuthorizeRequest) IsValid() *AppError {
 		return NewAppError("AuthData.IsValid", "model.authorize.is_valid.response_type.app_error", nil, "", http.StatusBadRequest)
 	}
 
-	if ar.RedirectUri == "" || len(ar.RedirectUri) > 256 || !IsValidHTTPUrl(ar.RedirectUri) {
+	if ar.RedirectURI == "" || len(ar.RedirectURI) > 256 || !IsValidHTTPURL(ar.RedirectURI) {
 		return NewAppError("AuthData.IsValid", "model.authorize.is_valid.redirect_uri.app_error", nil, "client_id="+ar.ClientId, http.StatusBadRequest)
 	}