GITBOOK-846: change request with no subject merged in GitBook

Author: xxhong

developers/auth-service/sdks/flutter.md

@@ -430,6 +430,19 @@ static void openWebWallet() {
 }
 ```
 
+### Set security account config
+
+```dart
+// set security account config, 
+// promptSettingWhenSign default value is 1.
+// promptMasterPasswordSettingWhenLogin default value is 0.
+// 0 no prompt
+// 1 first time show prompt
+// 2 every time show prompt
+final config = SecurityAccountConfig(1, 2);
+ParticleAuth.setSecurityAccountConfig(config);
+```
+
 ## EVM Service
 
 ### Write Contract

developers/node-service/evm-chains-api/README.md

@@ -8,7 +8,7 @@
 
 ### Structure
 
-The EVM Chains API allows applications to connect to a EVM chain node that is part of the EVM blockchain. Developers can interact with on-chain data and send different types of transactions to the network by utilizing the endpoints provided by the API.
+The EVM Chains API allows applications to connect to an EVM chain node that is part of the EVM blockchain. Developers can interact with on-chain data and send different types of transactions to the network by utilizing the endpoints provided by the API.
 
 The EVM Chains API follows a JSON-RPC 2.0 standard. We extended a field named **chainId** to specify which network we use.