[corndoge]

Somehow I doubt Azure Key Vault is easier than a gitignore line and a text file

[RussianCow]

Probably not, but it's a lot easier to accidentally commit (or otherwise expose) a text file.

[okreallywtf]

Its not easier for sure, but it is more reliable and harder to mess up by making a single character mistake.

[bluebeard]

.gitignore is easy but the pw is still naked. Probably a good practice to hash it.

[slrz]

Probably not as the result would be useless for authenticating against another service.