Verify //认证
steem.auth.verify(name, password, auths)
eg:
let username = 'epexa'
let password = 'P5...' // 用户密码
let auths = {
    posting: [['STM6...']],
}
steem.auth.verify(username, password, auths)  //return true or false

Generate Keys  //生成公钥对
steem.auth.generateKeys(name, password, roles)
let publicKeys = this.steem.auth.generateKeys(newAccountName, newAccountPassword, ['owner', 'active', 'posting', 'memo'])
  //返回数据
  {owner: "STM5vFQtKD5UWRL2A5HkzVTaT39y5ooqoUbBwoXbxgdXuEdkDnXR5", active: "STM66Gn72YKir393f2VXnuiHMPHKqfmnE341XCh1Wycnn6ZRenx4k", posting: "STM7L3QUgSLAZYHWHX7xzAsMA63CwbTMvAw1MFgAexePegSwK5QtD", memo: "STM58gNrK6Pex5mkeVgHM6nkpGN83sXzkm7bnhWsQ1BLn7AVfYzkc"}


Get Private Keys //从用户名和密码得到对应的公私钥
steem.auth.getPrivateKeys(name, password, roles)
let roles = ['owner', 'active', 'posting', 'memo']
let res = this.steem.auth.getPrivateKeys(name, password, roles)
  //返回数据
  active: "5J81RXJwxLNz2exiQqYVaFDKDSvqn8qHwWjsLDGWjApACBWEZCw"
  activePubkey: "STM5xzjJtutZywhC5pjPXt7Kkkk9B7VEuwWrHVrYK2YJameDtDhho"
  memo: "5HpgaGtT1oQQUFuqH5d94FAqyEX9SVTJQHX19hXpGKQXe8w2tXi"
  memoPubkey: "STM7BFYtrEgY5sB4BTmyvdZf9cgmECKujcRqTHCXk2tdf2kQ95ULF"
  owner: "5JfxkpNEBFD7v6tRiew55F2fDkGKVSvvzPrR5q6KmJ65dv9PG9n"
  ownerPubkey: "STM8WN3VznWshG4Q32jBM7iuDwA4mkXZDtHwXx5zBrHSCwQV2nssx"
  posting: "5Jv9NHkL8TrdvJNue2EKZHQDbXJqXGoaBBt8xy6q6ep1AkMA3VS"
  postingPubkey: "STM5f2H2rbSmVoEzrVSpfYGrP1qTp5Lyq1nPDen9hwA3AxFwLYAGs"

Is Wif //判断是否是私钥，返回 true 或 false
steem.auth.isWif(privWif)
let privWif = "5JfxkpNEBFD7v6tRiew55F2fDkGKVSvvzPrR5q6KmJ65dv9PG9n"
let res = this.steem.auth.isWif(privWif)  //true

To Wif //从用户名和密码得到对应的私钥
steem.auth.toWif(name, password, role)
let role = ["active"]
let res = this.steem.auth.toWif(name, password, role)
  //返回数据
  "5Jv9NHkL8TrdvJNue2EKZHQDbXJqXGoaBBt8xy6q6ep1AkMA3VS"

Wif Is Valid //验证公私钥对是否匹配，返回true 或 false
steem.auth.wifIsValid(privWif, pubWif)
let privWif = "5Jv9NHkL8TrdvJNue2EKZHQDbXJqXGoaBBt8xy6q6ep1AkMA3VS"
let pubWif = "STM5f2H2rbSmVoEzrVSpfYGrP1qTp5Lyq1nPDen9hwA3AxFwLYAGs"
let res = this.steem.auth.wifIsValid(privWif, pubWif)   //true


Wif To Public //从私钥得到对应的公钥
steem.auth.wifToPublic(privWif)
let privWif = "5Jv9NHkL8TrdvJNue2EKZHQDbXJqXGoaBBt8xy6q6ep1AkMA3VS"
let res = this.steem.auth.wifToPublic(privWif)

Sign Transaction
steem.auth.signTransaction(trx, keys)