参考steemsnippets

//用发贴私钥或密码登录
login(){
  //用私钥或密码登录
  this.isLoading = true
  let account = this.username
  this.steem.api.getAccounts([account], (err, result) => {
    if(result.length === 0){
      this.isLoading = false
      alert("用户不存在！")
    }else{
      //用户存在
      let pubWif = result[0].posting.key_auths[0][0]
      let privWif = this.password
      let isvalid
      //判断是私钥还是密码
      let res = this.steem.auth.isWif(privWif)
      if(res === true){
        //是私钥
        console.log(456, res, '是私钥！')
        try{
          isvalid = this.steem.auth.wifIsValid(privWif, pubWif)
        }
        catch(e){
          isvalid = 'false'
        }
        if(isvalid === true){
          this.isLoading = false
          console.log(' Welcome.', account)
          this.$store.commit('saveUser', {username: account, password: privWif})
          this.$router.push({path:'/'})
        }else{
          this.isLoading = false
          alert(`错误！请检查用户名和发贴密钥！`)
        }
      }else{
        //是密码
        console.log(458, res, '是密码')
        //获取发贴私钥
        let role = ["posting"]
        let Wif = this.steem.auth.toWif(account, privWif, role)
        try{
          isvalid = this.steem.auth.wifIsValid(Wif, pubWif)
        }
        catch(e){
          isvalid = 'false'
        }
        if(isvalid === true){
          this.isLoading = false
          console.log(' Welcome.', account)
          this.$store.commit('saveUser', {username: account, password: Wif})
          this.$router.push({path:'/'})
        }else{
          this.isLoading = false
          alert(`错误！请检查用户名和密码！`)
        }
      }
    }

  })
}