SoupToNuts is a repository of technical articles and example software covering Postfix, OpenSSH, C and C++, Live Linux CD, MySQL, SQLite, Berkeley DB, Bash and System Administration.
Auth0 Token Vault handles secure token storage, exchange, and refresh for external providers so you don't have to build it yourself.
Rolling your own OAuth token storage can be a security liability. Token Vault securely stores access and refresh tokens from federated providers and handles exchange and renewal automatically. Connected accounts, refresh exchange, and privileged worker flows included.