Update README.md

Author: asmyasnikov

README.md

@@ -189,6 +189,9 @@ Package | Type | Description
 [ydb-go-sdk-metrics](https://github.com/ydb-platform/ydb-go-sdk-metrics) | metrics | common metrics of ydb-go-sdk. Package declare interfaces such as `Registry`, `GaugeVec` and `Gauge` and use it for create `trace.Driver` and `trace.Table` traces                           |
 [ydb-go-sdk-prometheus](https://github.com/ydb-platform/ydb-go-sdk-prometheus) | metrics | prometheus wrapper over [ydb-go-sdk-metrics](https://github.com/ydb-platform/ydb-go-sdk-metrics) | [ydbPrometheus.WithTraces](https://github.com/ydb-platform/ydb-go-sdk-prometheus/blob/master/internal/cmd/bench/main.go#L56)
 [ydb-go-sdk-opentracing](https://github.com/ydb-platform/ydb-go-sdk-opentracing) | tracing | opentracing plugin for trace internal ydb-go-sdk calls | [ydbOpentracing.WithTraces](https://github.com/ydb-platform/ydb-go-sdk-opentracing/blob/master/internal/cmd/bench/main.go#L86) 
+[ydb-go-yc](https://github.com/ydb-platform/ydb-go-yc) | credentials | credentials provider for Yandex.Cloud | [yc.WithServiceAccountKeyFileCredentials](https://github.com/ydb-platform/ydb-go-yc/blob/master/internal/cmd/connect/main.go#L22) [yc.WithInternalCA](https://github.com/ydb-platform/ydb-go-yc/blob/master/internal/cmd/connect/main.go#L22) [yc.WithMetadataCredentials](https://github.com/ydb-platform/ydb-go-yc/blob/master/internal/cmd/connect/main.go#L24) 
+[ydb-go-yc-metadata](https://github.com/ydb-platform/ydb-go-yc-metadata) | credentials | metadata credentials provider for Yandex.Cloud | [yc.WithInternalCA](https://github.com/ydb-platform/ydb-go-yc-metadata/blob/master/options.go#L23) [yc.WithCredentials](https://github.com/ydb-platform/ydb-go-yc-metadata/blob/master/options.go#L17) 
+[ydb-go-sdk-auth-environ](https://github.com/ydb-platform/ydb-go-sdk-auth-environ) | credentials | create credentials from environ | [ydbEnviron. WithEnvironCredentials](https://github.com/ydb-platform/ydb-go-sdk-auth-environ/blob/master/env.go#L11) 
 
 ## Examples <a name="Examples"></a>