Datasource example
{
"name": "datasource",
"connector": "@gdbc/loopback-connector-contract-web3",
"provider": "ws://localhost:8545",
"abi":[],
"address": "0x1234567890987654321234567890987654321234",
"options": {
"defaultAccount": "0x1234567890987654321234567890987654321234"
},
"mnemonic" : {
"method" : "raw",
"value": "spike member shift round van idea despair have provide tunnel silent rug"
},
}