Merge branch 'M3-User-Auth' into 'main'

.../fuseri/model/dto/exercise/AnswerInQuestionCreateDto.java

...java/org/fuseri/model/dto/exercise/QuestionCreateDto.java

...java/org/fuseri/model/dto/exercise/QuestionUpdateDto.java

...n/java/org/fuseri/model/dto/lecture/LectureCreateDto.java

...odel/src/main/java/org/fuseri/model/dto/mail/MailDto.java

...l/src/main/java/org/fuseri/model/dto/user/AddressDto.java

...in/java/org/fuseri/model/dto/user/UserAddLanguageDto.java

...rc/main/java/org/fuseri/model/dto/user/UserCreateDto.java

...odel/src/main/java/org/fuseri/model/dto/user/UserDto.java

...del/src/main/java/org/fuseri/model/dto/user/UserType.java

application/module-certificate/pom.xml

...useri/modulecertificate/ModuleCertificateApplication.java

.../modulecertificate/certificate/CertificateController.java

...rg/fuseri/modulecertificate/config/AppSecurityConfig.java

...ertificate/datainitializer/DataInitializerController.java

...ficate/exceptions/RestResponseEntityExceptionHandler.java

...ule-certificate/src/main/resources/application.properties

.../fuseri/modulecertificate/CertificateControllerTests.java

.../org/fuseri/modulecertificate/CertificateFacadeTests.java

.../org/fuseri/modulecertificate/CertificateMapperTests.java