thanks for the nice tuto, so
why loginResult is null when i create a user by createUser Mutation?

the user is successfully created under mongodb

for your info the npm update --force generate this
npm WARN using --force Recommended protections disabled.
npm WARN ERESOLVE overriding peer dependency
npm WARN Found: @accounts/[email protected]
npm WARN node_modules/@accounts/password
npm WARN @accounts/password@"^0.31.1" from the root project
npm WARN
npm WARN Could not resolve dependency:
npm WARN peer @accounts/password@"^0.30.0" from @accounts/[email protected]
npm WARN node_modules/@accounts/graphql-api
npm WARN @accounts/graphql-api@"^0.31.1" from the root project
npm WARN ERESOLVE overriding peer dependency
npm WARN Found: @accounts/[email protected]
npm WARN node_modules/@accounts/server
npm WARN @accounts/server@"^0.31.1" from the root project
npm WARN
npm WARN Could not resolve dependency:
npm WARN peer @accounts/server@"^0.30.0" from @accounts/[email protected]
npm WARN node_modules/@accounts/password
npm WARN @accounts/password@"^0.31.1" from the root project
npm WARN ERESOLVE overriding peer dependency
npm WARN Found: @accounts/[email protected]
npm WARN node_modules/@accounts/server
npm WARN @accounts/server@"^0.31.1" from the root project
npm WARN
npm WARN Could not resolve dependency:
npm WARN peer @accounts/server@"^0.30.0" from @accounts/[email protected]
npm WARN node_modules/@accounts/graphql-api
npm WARN @accounts/graphql-api@"^0.31.1" from the root project
npm WARN deprecated @graphql-toolkit/[email protected]: GraphQL Toolkit is deprecated and merged into GraphQL Tools, so it will no longer get updates. Use GraphQL Tools instead to stay up-to-date! Check out https://www.graphql-tools.com/docs/migration-from-toolkit for migration and https://the-guild.dev/blog/graphql-tools-v6 for new changes.