sigdate of initializing identity is 0 instead of empty block uid
In the code, the memberships contains a blockuid as the sigdate : https://github.com/ucoin-io/ucoin/blob/master/app/controllers/blockchain.js#L126
On my node, I get the following information for the first user :
{
"pubkey": "82kSbmq34JDVdza7daiVB6bXPfG4jzJVHpWasSksQ696",
"uid": "john",
"sigDate": 0,
"memberships": [
{
"version": 2,
"currency": "super_currency",
"membership": "IN",
"blockNumber": 0,
"blockHash": "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855",
"written": 0
}
]
}