Store and Read tokens with Azure Keyvault

[oreHGA]

Here's a quick example of using it in javascript - https://github.com/Azure/azure-sdk-for-js/blob/main/sdk/keyvault/keyvault-secrets/samples/v4/javascript/helloWorld.js

It's actually quite straight forward

• [ ] stores token in keyvault -> writes keyvaultTokenId to database

• [ ] generate a neurofusionEncryption key for user and store in keyvault too

[oreHGA]

not important. using env secrets works just fine rigth now