[SDK] Functions for saving and loading Credentials
to/from disk
#84
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Description of Changes
This commit adds two functions to the Rust SDK,
identity::save_credentials
andidentity::load_credentials
, which abstract over the common desire to save a user's credentials to a file in (a subdir of)~
, and load it when re-connecting.In addition to de-duplicating common functionality, this allows us to remove a relatively complex section of the Rust SDK Quickstart guide.
API
If the API is breaking, please state below what will break