solution: support Basic Auth

src/test/groovy/io/emeraldpay/dshackle/config/UpstreamsConfigReaderSpec.groovy

@@ -40,9 +40,11 @@ class UpstreamsConfigReaderSpec extends Specification {
             connection instanceof UpstreamsConfig.EthereumConnection
             with((UpstreamsConfig.EthereumConnection)connection) {
                 rpc.url == new URI("https://mainnet.infura.io/v3/fa28c968191849c1aff541ad1d8511f2")
+                rpc.auth != null
                 rpc.auth instanceof UpstreamsConfig.BasicAuth
                 with((UpstreamsConfig.BasicAuth)rpc.auth) {
-                    key == "4fc258fe41a68149c199ad8f281f2015"
+                    username == "4fc258fe41a68149c199ad8f281f2015"
+                    password == "1a68f20154fc258fe4149c199ad8f281"
                 }
                 ws == null
             }

src/test/resources/upstreams-basic.yaml

@@ -25,4 +25,5 @@ upstreams:
           url: "https://mainnet.infura.io/v3/fa28c968191849c1aff541ad1d8511f2"
           auth:
             type: basic
-            key: 4fc258fe41a68149c199ad8f281f2015
+            username: 4fc258fe41a68149c199ad8f281f2015
+            password: 1a68f20154fc258fe4149c199ad8f281