diff --git a/src/org/kar/archidata/model/User.java b/src/org/kar/archidata/model/User.java
index c8f6038..5929b8d 100644
--- a/src/org/kar/archidata/model/User.java
+++ b/src/org/kar/archidata/model/User.java
@@ -28,26 +28,29 @@ import io.swagger.v3.oas.annotations.media.Schema;
 import jakarta.annotation.Nullable;
 import jakarta.persistence.Column;
 import jakarta.persistence.Table;
+import jakarta.validation.constraints.NotNull;
+import jakarta.validation.constraints.Pattern;
+import jakarta.validation.constraints.Size;
 import jakarta.ws.rs.DefaultValue;
 
 @Table(name = "user")
 @DataIfNotExists
 @JsonInclude(JsonInclude.Include.NON_NULL)
 public class User extends GenericDataSoftDelete {
+	@NotNull
 	@Column(length = 128)
+	@Size(min = 3, max = 128)
+	@Pattern(regexp = "^[a-zA-Z0-9-_ \\.]+$")
 	public String login = null;
 
 	@JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd'T'HH:mm:ss.SSSXXX")
 	public Timestamp lastConnection = null;
-	@DefaultValue("'0'")
-	@Column(nullable = false)
-	public boolean admin = false;
+
 	@DefaultValue("'0'")
 	@Column(nullable = false)
 	public boolean blocked = false;
-	@DefaultValue("'0'")
-	@Column(nullable = false)
-	public boolean removed = false;
+	@Column(length = 512)
+	public String blockedReason;
 
 	@Schema(description = "List of Id of the specific covers")
 	@DataJson(targetEntity = Data.class)
@@ -56,7 +59,8 @@ public class User extends GenericDataSoftDelete {
 
 	@Override
 	public String toString() {
-		return "User [login=" + this.login + ", last=" + this.lastConnection + ", admin=" + this.admin + "]";
+		return "User [login=" + this.login + ", last=" + this.lastConnection + ", blocked=" + this.blocked
+				+ ", blockedReason=" + this.blockedReason + "]";
 	}
 
 }