需要往目标库迁移’账号’时传递
例如：
{
  "SourceType": "Krds",
  "TargetType": "Krds",
  "TargetRegion": "cn-beijing-6",
  "region": "cn-beijing-6",
  "DbSchema": "{\"is_full\":true}",
  "SubTasks": "BackupRecovery,RunReplication",
  "SourceRegion": "cn-beijing-6",
  "SourceInstanceId": "******",
  "TargetInstanceId": "******",
  "SourceUsername": "admin",
  "SourceUser": [
     {
        "Username":"testuser",
        "SourceHost":"%"
    }
  ],
  "DTSParameter": [
    {
      "DBParameter": "log_bin_trust_function_creators",
      "TargetDBParameterValue": "OFF"
    },
    {
      "DBParameter": "binlog_format",
      "TargetDBParameterValue": "ROW"
    }
  ],
  "SourcePassword": "******",
  "Type": "Transmission"
}
创建预检查
