diff --git a/src/main/kotlin/com/example/demo/entities/User.kt b/src/main/kotlin/com/example/demo/entities/User.kt
index b9e752f..4637485 100644
--- a/src/main/kotlin/com/example/demo/entities/User.kt
+++ b/src/main/kotlin/com/example/demo/entities/User.kt
@@ -2,6 +2,7 @@ package com.example.demo.entities
 
 import io.quarkus.hibernate.orm.panache.kotlin.PanacheCompanion
 import io.quarkus.hibernate.orm.panache.kotlin.PanacheEntity
+import jakarta.persistence.Column
 import jakarta.persistence.Entity
 import jakarta.validation.constraints.Email
 import jakarta.validation.constraints.NotEmpty
@@ -12,5 +13,6 @@ class User : PanacheEntity() {
 
     @NotEmpty(message = "Login can't be empty")
     @Email(message = "The email address is invalid.")
+    @Column(unique = true)
     lateinit var login: String;
 }
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