GetAnnouncementHandler handles fetching an announcement for a course.

GetStudentCourseGradesHandler handles REST requests and calls the gRPC Grades Microservice.

GetStudentCourssHandler handles REST requests and calls the gRPC Students Microservice.

GetStudentGradesHandler handles REST requests and calls the gRPC Grades Microservice to return all the student grades.

InitCoursesGRPCClient initializes the course-microservice gRPC client connection.

InitGradesGRPCClient initializes the grades-microservice gRPC client connection.

InitHomeWorkGRPCClient initializes the homework-microservice gRPC client connection.

InitStaffGRPCClient initializes the staff-microservice gRPC client connection.

InitStudentsGRPCClient initializes the students-microservice gRPC client connection.