finish login interface and modify some issue

Helius

2020-05-18 a5b282e1c85ea498377215e43ff475054bf2e4e2

 src/main/java/com/xcong/excoin/common/system/bean/LoginUserBean.java

@@ -32,7 +32,7 @@
    @JsonIgnore
    @Override
    public String getUsername() {
        return memberEntity.getUsername();
        return "";
    }

    @JsonIgnore