diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 78e2bd7..ce17e2f 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -9,7 +9,8 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - name: Checkout code
+        uses: actions/checkout@v4
 
       - name: Build docker-compose
         run: |
diff --git a/.github/workflows/linter.yml b/.github/workflows/linter.yml
new file mode 100644
index 0000000..3fd2209
--- /dev/null
+++ b/.github/workflows/linter.yml
@@ -0,0 +1,30 @@
+name: linter.yml
+on:
+  pull_request
+
+jobs:
+  go_linter:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: "1.25"
+
+      - name: Install dependencies
+        run: |
+          go install github.com/golangci/golangci-lint/cmd/golangci-lint@latest
+        
+
+      - name: Run golangci-lint
+        run: |
+          golangci-lint run
+
+
+
+
+
diff --git a/go.mod b/go.mod
index ed629d3..1438701 100644
--- a/go.mod
+++ b/go.mod
@@ -1,17 +1,20 @@
 module EventSpace
 
-go 1.26.1
+go 1.25.0
+
+require (
+	github.com/go-chi/chi/v5 v5.2.5
+	github.com/golang-jwt/jwt/v5 v5.3.1
+	github.com/google/uuid v1.6.0
+	github.com/jackc/pgx/v5 v5.9.2
+	github.com/pelletier/go-toml/v2 v2.3.1
+	golang.org/x/crypto v0.50.0
+)
 
 require (
-	github.com/go-chi/chi/v5 v5.2.5 // indirect
-	github.com/golang-jwt/jwt/v5 v5.3.1 // indirect
-	github.com/google/uuid v1.6.0 // indirect
 	github.com/jackc/pgpassfile v1.0.0 // indirect
 	github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 // indirect
-	github.com/jackc/pgx/v5 v5.9.2 // indirect
 	github.com/jackc/puddle/v2 v2.2.2 // indirect
-	github.com/pelletier/go-toml/v2 v2.3.1 // indirect
-	golang.org/x/crypto v0.50.0 // indirect
 	golang.org/x/sync v0.20.0 // indirect
 	golang.org/x/text v0.36.0 // indirect
 )
diff --git a/go.sum b/go.sum
index c07d29f..9901e05 100644
--- a/go.sum
+++ b/go.sum
@@ -1,4 +1,6 @@
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/go-chi/chi/v5 v5.2.5 h1:Eg4myHZBjyvJmAFjFvWgrqDTXFyOzjj7YIm3L3mu6Ug=
 github.com/go-chi/chi/v5 v5.2.5/go.mod h1:X7Gx4mteadT3eDOMTsXzmI4/rwUpOwBHLpAfupzFJP0=
 github.com/golang-jwt/jwt/v5 v5.3.1 h1:kYf81DTWFe7t+1VvL7eS+jKFVWaUnK9cB1qbwn63YCY=
@@ -15,17 +17,20 @@ github.com/jackc/puddle/v2 v2.2.2 h1:PR8nw+E/1w0GLuRFSmiioY6UooMp6KJv0/61nB7icHo
 github.com/jackc/puddle/v2 v2.2.2/go.mod h1:vriiEXHvEE654aYKXXjOvZM39qJ0q+azkZFrfEOc3H4=
 github.com/pelletier/go-toml/v2 v2.3.1 h1:MYEvvGnQjeNkRF1qUuGolNtNExTDwct51yp7olPtrEc=
 github.com/pelletier/go-toml/v2 v2.3.1/go.mod h1:2gIqNv+qfxSVS7cM2xJQKtLSTLUE9V8t9Stt+h56mCY=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
+github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
 golang.org/x/crypto v0.50.0 h1:zO47/JPrL6vsNkINmLoo/PH1gcxpls50DNogFvB5ZGI=
 golang.org/x/crypto v0.50.0/go.mod h1:3muZ7vA7PBCE6xgPX7nkzzjiUq87kRItoJQM1Yo8S+Q=
 golang.org/x/sync v0.20.0 h1:e0PTpb7pjO8GAtTs2dQ6jYa5BWYlMuX047Dco/pItO4=
 golang.org/x/sync v0.20.0/go.mod h1:9xrNwdLfx4jkKbNva9FpL6vEN7evnE43NNNJQ2LF3+0=
-golang.org/x/text v0.29.0 h1:1neNs90w9YzJ9BocxfsQNHKuAT4pkghyXc4nhZ6sJvk=
-golang.org/x/text v0.29.0/go.mod h1:7MhJOA9CD2qZyOKYazxdYMF85OwPdEr9jTtBpO7ydH4=
 golang.org/x/text v0.36.0 h1:JfKh3XmcRPqZPKevfXVpI1wXPTqbkE5f7JA92a55Yxg=
 golang.org/x/text v0.36.0/go.mod h1:NIdBknypM8iqVmPiuco0Dh6P5Jcdk8lJL0CUebqK164=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/internal/auth/handler/http.go b/internal/auth/handler/http.go
index e8c1676..9d2e3ad 100644
--- a/internal/auth/handler/http.go
+++ b/internal/auth/handler/http.go
@@ -36,10 +36,14 @@ func (h *AuthHandler) RegisterHandler(w http.ResponseWriter, r *http.Request) {
 
 	w.Header().Set("Content-Type", "application/json")
 	w.WriteHeader(http.StatusCreated)
-	json.NewEncoder(w).Encode(map[string]interface{}{
+	err = json.NewEncoder(w).Encode(map[string]interface{}{
 		"access_token": tokens.AccessToken,
 		"expires_at":   tokens.ExpiresAt,
 	})
+	if err != nil {
+		log.Printf("json encode error: %v", err)
+		http.Error(w, err.Error(), http.StatusBadRequest)
+	}
 }
 
 func (h *AuthHandler) Login(w http.ResponseWriter, r *http.Request) {
@@ -62,10 +66,14 @@ func (h *AuthHandler) Login(w http.ResponseWriter, r *http.Request) {
 
 	w.Header().Set("Content-Type", "application/json")
 	w.WriteHeader(http.StatusCreated)
-	json.NewEncoder(w).Encode(map[string]interface{}{
+	err = json.NewEncoder(w).Encode(map[string]interface{}{
 		"access_token": tokens.AccessToken,
 		"expires_at":   tokens.ExpiresAt,
 	})
+	if err != nil {
+		log.Printf("json encode error: %v", err)
+		http.Error(w, err.Error(), http.StatusBadRequest)
+	}
 }
 
 func (h *AuthHandler) Refresh(w http.ResponseWriter, r *http.Request) {
@@ -87,10 +95,14 @@ func (h *AuthHandler) Refresh(w http.ResponseWriter, r *http.Request) {
 
 	w.Header().Set("Content-Type", "application/json")
 	w.WriteHeader(http.StatusCreated)
-	json.NewEncoder(w).Encode(map[string]interface{}{
+	err = json.NewEncoder(w).Encode(map[string]interface{}{
 		"access_token": tokens.AccessToken,
 		"expires_at":   tokens.ExpiresAt,
 	})
+	if err != nil {
+		log.Printf("json encode error: %v", err)
+		http.Error(w, err.Error(), http.StatusBadRequest)
+	}
 
 }