diff --git a/backend/internal/domain/repositories/company_repository.go b/backend/internal/domain/repositories/company_repository.go
index cc978b4..54f6187 100644
--- a/backend/internal/domain/repositories/company_repository.go
+++ b/backend/internal/domain/repositories/company_repository.go
@@ -9,7 +9,7 @@ import (
 
 type CompanyRepository interface {
 	Get(ctx context.Context, id ulid.ULID) (*entities.Company, error)
-	Create(ctx context.Context, company *entities.Company) error
-	Update(ctx context.Context, company *entities.Company) error
+	Create(ctx context.Context, company *entities.CompanyCreate) error
+	Update(ctx context.Context, company *entities.CompanyUpdate) error
 	Delete(ctx context.Context, id ulid.ULID) error
 }
diff --git a/backend/internal/domain/repositories/customer_repository.go b/backend/internal/domain/repositories/customer_repository.go
index 31bc3d9..dde8e20 100644
--- a/backend/internal/domain/repositories/customer_repository.go
+++ b/backend/internal/domain/repositories/customer_repository.go
@@ -9,7 +9,7 @@ import (
 
 type CustomerRepository interface {
 	Get(ctx context.Context, id ulid.ULID) (*entities.Customer, error)
-	Create(ctx context.Context, customer *entities.Customer) error
-	Update(ctx context.Context, customer *entities.Customer) error
+	Create(ctx context.Context, customer *entities.CustomerCreate) error
+	Update(ctx context.Context, customer *entities.CustomerUpdate) error
 	Delete(ctx context.Context, id ulid.ULID) error
 }
diff --git a/backend/internal/domain/repositories/project_repository.go b/backend/internal/domain/repositories/project_repository.go
index 61304a4..0a556b1 100644
--- a/backend/internal/domain/repositories/project_repository.go
+++ b/backend/internal/domain/repositories/project_repository.go
@@ -9,7 +9,7 @@ import (
 
 type ProjectRepository interface {
 	Get(ctx context.Context, id ulid.ULID) (*entities.Project, error)
-	Create(ctx context.Context, project *entities.Project) error
-	Update(ctx context.Context, project *entities.Project) error
+	Create(ctx context.Context, project *entities.ProjectCreate) error
+	Update(ctx context.Context, project *entities.ProjectUpdate) error
 	Delete(ctx context.Context, id ulid.ULID) error
 }
diff --git a/backend/internal/domain/repositories/timeentry_repository.go b/backend/internal/domain/repositories/timeentry_repository.go
index 41af6a7..884b204 100644
--- a/backend/internal/domain/repositories/timeentry_repository.go
+++ b/backend/internal/domain/repositories/timeentry_repository.go
@@ -11,8 +11,8 @@ import (
 
 type TimeEntryRepository interface {
 	Get(ctx context.Context, id ulid.ULID) (*entities.TimeEntry, error)
-	Create(ctx context.Context, timeEntry *entities.TimeEntry) error
-	Update(ctx context.Context, timeEntry *entities.TimeEntry) error
+	Create(ctx context.Context, timeEntry *entities.TimeEntryCreate) error
+	Update(ctx context.Context, timeEntry *entities.TimeEntryUpdate) error
 	Delete(ctx context.Context, id ulid.ULID) error
 	GetByRange(ctx context.Context, userID ulid.ULID, from time.Time, to time.Time) ([]*entities.TimeEntry, error)
 }
diff --git a/backend/internal/domain/repositories/user_repository.go b/backend/internal/domain/repositories/user_repository.go
index 0b1396e..851487d 100644
--- a/backend/internal/domain/repositories/user_repository.go
+++ b/backend/internal/domain/repositories/user_repository.go
@@ -12,5 +12,5 @@ type UserRepository interface {
 	Create(ctx context.Context, user *entities.UserCreate) error
 	Update(ctx context.Context, user *entities.UserUpdate) error
 	Delete(ctx context.Context, id ulid.ULID) error
-	GetByUsername(ctx context.Context, username string) (*entities.User, error)
+	GetByUsername(ctx context.Context, email string) (*entities.User, error)
 }
diff --git a/docu/code_examples/api_handler.go b/docu/code_examples/api_handler.go
index b83fac6..532ee39 100644
--- a/docu/code_examples/api_handler.go
+++ b/docu/code_examples/api_handler.go
@@ -4,11 +4,11 @@ package main
 import (
 	"net/http"
 
+	"github.com/email/timetracker/internal/application/timetracking"
+	"github.com/email/timetracker/internal/interfaces/http/dto"
+	"github.com/email/timetracker/internal/interfaces/http/middleware"
 	"github.com/gin-gonic/gin"
 	"github.com/google/uuid"
-	"github.com/username/timetracker/internal/application/timetracking"
-	"github.com/username/timetracker/internal/interfaces/http/dto"
-	"github.com/username/timetracker/internal/interfaces/http/middleware"
 )
 
 // TimeEntryHandler behandelt HTTP-Anfragen für Zeitbuchungen
diff --git a/docu/code_examples/fpgo_repository.go b/docu/code_examples/fpgo_repository.go
index e8c693b..4dfcec2 100644
--- a/docu/code_examples/fpgo_repository.go
+++ b/docu/code_examples/fpgo_repository.go
@@ -5,9 +5,9 @@ import (
 	"context"
 	"time"
 
+	"github.com/email/timetracker/internal/domain/entities"
+	"github.com/email/timetracker/pkg/functional"
 	"github.com/google/uuid"
-	"github.com/username/timetracker/internal/domain/entities"
-	"github.com/username/timetracker/pkg/functional"
 )
 
 // TimeEntryFilter enthält Filter für die Suche nach Zeitbuchungen
diff --git a/docu/code_examples/fpgo_service.go b/docu/code_examples/fpgo_service.go
index f633bde..fc42b6a 100644
--- a/docu/code_examples/fpgo_service.go
+++ b/docu/code_examples/fpgo_service.go
@@ -5,11 +5,11 @@ import (
 	"context"
 	"time"
 
+	"github.com/email/timetracker/internal/domain/entities"
+	"github.com/email/timetracker/internal/domain/repositories"
+	"github.com/email/timetracker/pkg/functional"
+	"github.com/email/timetracker/pkg/validator"
 	"github.com/google/uuid"
-	"github.com/username/timetracker/internal/domain/entities"
-	"github.com/username/timetracker/internal/domain/repositories"
-	"github.com/username/timetracker/pkg/functional"
-	"github.com/username/timetracker/pkg/validator"
 )
 
 // CreateTimeEntryCommand enthält die Daten zum Erstellen einer Zeitbuchung