create user mutation

app/schema/mutations/__init__.py

@@ -2,3 +2,4 @@ from .close_todo import CloseTodo
 from .create_todo import CreateTodo
 from .delete_todo import DeleteTodo
 from .update_todo import UpdateTodo
+from .create_user import CreateUser

app/schema/mutations/create_user.py

@@ -0,0 +1,15 @@
+import graphene
+
+from app.schema.types.user import UserResponseField
+from app.usecases.user.create_user import create_user
+
+
+class CreateUser(graphene.Mutation):
+    class Arguments:
+        username = graphene.String()
+
+    result = graphene.Field(UserResponseField)
+
+    def mutate(self, info, username: str):
+        user = create_user(username)
+        return CreateUser(UserResponseField(user=user))

app/schema/mutations/mutations.py

@@ -1,10 +1,13 @@
 import graphene
 
-from . import CreateTodo, DeleteTodo, UpdateTodo, CloseTodo
+from . import CreateTodo, DeleteTodo, UpdateTodo, CloseTodo, CreateUser
 
 
 class Mutations(graphene.ObjectType):
+    # todos
     create_todo = CreateTodo.Field()
     update_todo = UpdateTodo.Field()
     delete_todo = DeleteTodo.Field()
     close_todo = CloseTodo.Field()
+    # user
+    create_user = CreateUser.Field()

app/schema/queries/queries.py

@@ -1,8 +1,8 @@
 import graphene
 
-from app.schema.types.todo import TodoListResponseField, TodoResponseField
 from .todo import resolve_get_todo, resolve_list_todos
 from .user import resolve_list_users, resolve_get_user
+from ..types.todo import TodoListResponseField, TodoResponseField
 from ..types.user import UserListResponseField, UserResponseField
 
 

app/usecases/user/create_user.py

@@ -0,0 +1,6 @@
+from app.models.user import User
+from app.repositories.users import add_user
+
+
+def create_user(username: str) -> User:
+    return add_user(username)