IdentityKey
This type can contain the following fields:
| field | type | info | 
|---|---|---|
| added | long | the first time this identity key was seen | 
| qr_code_data | String | base64-encoded QR code data | 
| safety_number | String | |
| trust_level | String | One of TRUSTED_UNVERIFIED, TRUSTED_VERIFIED or UNTRUSTED | 
- v1.IdentityKeyList.identities
- v1.UntrustedIdentityError.identity_key