diff --git a/model/src/lib.rs b/model/src/lib.rs
index 18175a2..168ae88 100644
--- a/model/src/lib.rs
+++ b/model/src/lib.rs
@@ -63,6 +63,11 @@ pub struct Group {
     pub users: Vec<String>,
 }
 
+#[derive(PartialEq, Eq, Debug, Serialize, Deserialize)]
+pub struct CreateGroupRequest {
+    pub display_name: String,
+}
+
 #[derive(Clone, Serialize, Deserialize)]
 pub struct JWTClaims {
     pub exp: DateTime<Utc>,
diff --git a/src/domain/handler.rs b/src/domain/handler.rs
index f0e65be..2eb33ce 100644
--- a/src/domain/handler.rs
+++ b/src/domain/handler.rs
@@ -10,6 +10,7 @@ pub trait BackendHandler: Clone + Send {
     async fn list_users(&self, request: ListUsersRequest) -> Result<Vec<User>>;
     async fn list_groups(&self) -> Result<Vec<Group>>;
     async fn create_user(&self, request: CreateUserRequest) -> Result<()>;
+    async fn create_group(&self, request: CreateGroupRequest) -> Result<i32>;
     async fn get_user_groups(&self, user: String) -> Result<HashSet<String>>;
 }
 
@@ -25,6 +26,7 @@ mockall::mock! {
         async fn list_users(&self, request: ListUsersRequest) -> Result<Vec<User>>;
         async fn list_groups(&self) -> Result<Vec<Group>>;
         async fn create_user(&self, request: CreateUserRequest) -> Result<()>;
+        async fn create_group(&self, request: CreateGroupRequest) -> Result<i32>;
         async fn get_user_groups(&self, user: String) -> Result<HashSet<String>>;
     }
 }
diff --git a/src/domain/sql_backend_handler.rs b/src/domain/sql_backend_handler.rs
index 76abdf2..643814f 100644
--- a/src/domain/sql_backend_handler.rs
+++ b/src/domain/sql_backend_handler.rs
@@ -242,6 +242,22 @@ impl BackendHandler for SqlBackendHandler {
         sqlx::query(&query).execute(&self.sql_pool).await?;
         Ok(())
     }
+    async fn create_group(&self, request: CreateGroupRequest) -> Result<i32> {
+        let query = Query::insert()
+            .into_table(Groups::Table)
+            .columns(vec![Groups::DisplayName])
+            .values_panic(vec![request.display_name.as_str().into()])
+            .to_string(DbQueryBuilder {});
+        sqlx::query(&query).execute(&self.sql_pool).await?;
+        let query = Query::select()
+            .column(Groups::GroupId)
+            .from(Groups::Table)
+            .and_where(Expr::col(Groups::DisplayName).eq(request.display_name.as_str()))
+            .to_string(DbQueryBuilder {});
+        let row = sqlx::query(&query).fetch_one(&self.sql_pool).await?;
+        Ok(
+            row.get::<i32, _>(&*Groups::GroupId.to_string()))
+    }
 }
 
 #[cfg(test)]
@@ -271,16 +287,11 @@ mod tests {
             .unwrap();
     }
 
-    async fn insert_group(sql_pool: &Pool, id: u32, name: &str) {
-        let query = Query::insert()
-            .into_table(Groups::Table)
-            .columns(vec![Groups::GroupId, Groups::DisplayName])
-            .values_panic(vec![id.into(), name.into()])
-            .to_string(DbQueryBuilder {});
-        sqlx::query(&query).execute(sql_pool).await.unwrap();
+    async fn insert_group(handler: &SqlBackendHandler, name: &str) -> i32 {
+        handler.create_group(CreateGroupRequest{display_name: name.to_string()}).await.unwrap()
     }
 
-    async fn insert_membership(sql_pool: &Pool, group_id: u32, user_id: &str) {
+    async fn insert_membership(sql_pool: &Pool, group_id: i32, user_id: &str) {
         let query = Query::insert()
             .into_table(Memberships::Table)
             .columns(vec![Memberships::UserId, Memberships::GroupId])
@@ -424,12 +435,12 @@ mod tests {
         insert_user(&handler, "bob", "bob00").await;
         insert_user(&handler, "patrick", "pass").await;
         insert_user(&handler, "John", "Pa33w0rd!").await;
-        insert_group(&sql_pool, 1, "Best Group").await;
-        insert_group(&sql_pool, 2, "Worst Group").await;
-        insert_membership(&sql_pool, 1, "bob").await;
-        insert_membership(&sql_pool, 1, "patrick").await;
-        insert_membership(&sql_pool, 2, "patrick").await;
-        insert_membership(&sql_pool, 2, "John").await;
+        let group_1 = insert_group(&handler, "Best Group").await;
+        let group_2 = insert_group(&handler, "Worst Group").await;
+        insert_membership(&sql_pool, group_1, "bob").await;
+        insert_membership(&sql_pool, group_1, "patrick").await;
+        insert_membership(&sql_pool, group_2, "patrick").await;
+        insert_membership(&sql_pool, group_2, "John").await;
         assert_eq!(
             handler.list_groups().await.unwrap(),
             vec![
@@ -453,11 +464,11 @@ mod tests {
         insert_user(&handler, "bob", "bob00").await;
         insert_user(&handler, "patrick", "pass").await;
         insert_user(&handler, "John", "Pa33w0rd!").await;
-        insert_group(&sql_pool, 1, "Group1").await;
-        insert_group(&sql_pool, 2, "Group2").await;
-        insert_membership(&sql_pool, 1, "bob").await;
-        insert_membership(&sql_pool, 1, "patrick").await;
-        insert_membership(&sql_pool, 2, "patrick").await;
+        let group_1 = insert_group(&handler, "Group1").await;
+        let group_2 = insert_group(&handler, "Group2").await;
+        insert_membership(&sql_pool, group_1, "bob").await;
+        insert_membership(&sql_pool, group_1, "patrick").await;
+        insert_membership(&sql_pool, group_2, "patrick").await;
         let mut bob_groups = HashSet::new();
         bob_groups.insert("Group1".to_string());
         let mut patrick_groups = HashSet::new();
diff --git a/src/domain/sql_tables.rs b/src/domain/sql_tables.rs
index 9acd5e3..0c69b98 100644
--- a/src/domain/sql_tables.rs
+++ b/src/domain/sql_tables.rs
@@ -78,6 +78,7 @@ pub async fn init_table(pool: &Pool) -> sqlx::Result<()> {
             .col(
                 ColumnDef::new(Groups::DisplayName)
                     .string_len(255)
+                    .unique_key()
                     .not_null(),
             )
             .to_string(DbQueryBuilder {}),
diff --git a/src/infra/tcp_backend_handler.rs b/src/infra/tcp_backend_handler.rs
index 8520776..1f869c7 100644
--- a/src/infra/tcp_backend_handler.rs
+++ b/src/infra/tcp_backend_handler.rs
@@ -28,6 +28,7 @@ mockall::mock! {
         async fn list_groups(&self) -> DomainResult<Vec<Group>>;
         async fn get_user_groups(&self, user: String) -> DomainResult<HashSet<String>>;
         async fn create_user(&self, request: CreateUserRequest) -> DomainResult<()>;
+        async fn create_group(&self, request: CreateGroupRequest) -> DomainResult<i32>;
     }
     #[async_trait]
     impl TcpBackendHandler for TestTcpBackendHandler {