Add endpoint to lists invited groups of a project

projects.go

@@ -1043,6 +1043,44 @@ func (s *ProjectsService) StarProject(pid interface{}, options ...RequestOptionF
 	return p, resp, nil
 }
 
+// ListProjectInvidedGroupOptions represents the available
+// ListProjectsInvitedGroups() options.
+//
+// GitLab API docs:
+// https://docs.gitlab.com/ee/api/projects.html#list-a-projects-invited-groups
+type ListProjectInvidedGroupOptions struct {
+	ListOptions
+	Search               *string           `url:"search,omitempty" json:"search,omitempty"`
+	MinAccessLevel       *AccessLevelValue `url:"min_access_level,omitempty" json:"min_access_level,omitempty"`
+	Relation             *[]string         `url:"relation,omitempty" json:"relation,omitempty"`
+	WithCustomAttributes *bool             `url:"with_custom_attributes,omitempty" json:"with_custom_attributes,omitempty"`
+}
+
+// ListProjectsInvitedGroups lists invited groups of a project
+//
+// GitLab API docs:
+// https://docs.gitlab.com/ee/api/projects.html#list-a-projects-invited-groups
+func (s *ProjectsService) ListProjectsInvitedGroups(pid interface{}, opt *ListProjectInvidedGroupOptions, options ...RequestOptionFunc) (*ProjectGroup, *Response, error) {
+	project, err := parseID(pid)
+	if err != nil {
+		return nil, nil, err
+	}
+	u := fmt.Sprintf("projects/%s/invited_groups", PathEscape(project))
+
+	req, err := s.client.NewRequest(http.MethodGet, u, opt, options)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	pg := new(ProjectGroup)
+	resp, err := s.client.Do(req, pg)
+	if err != nil {
+		return nil, resp, err
+	}
+
+	return pg, resp, nil
+}
+
 // UnstarProject unstars a given project.
 //
 // GitLab API docs: