Module '"wasp/server/operations"' has no exported member 'CustomSignup'.ts(2305)

[arsser]

When I use the "Custom Signup Action" :https://wasp-lang.dev/docs/auth/entities#custom-signup-action，like this：

import {
createProviderId,
sanitizeAndSerializeProviderData,
createUser,
} from 'wasp/server/auth'
import type { CustomSignup } from 'wasp/server/operations'

type CustomSignupInput = {
username: string
password: string
}
type CustomSignupOutput = {
success: boolean
message: string
}

export const signup: CustomSignup<
CustomSignupInput,
CustomSignupOutput

= async (args, { entities: { User } }) => {
...

And I got this error:
Module '"wasp/server/operations"' has no exported member 'CustomSignup'.ts(2305)

[infomiho]

Did you run wasp start after declaring the operation in your Wasp file?