HTTP Auth 认证冲突

auth_basic off;
proxy_pass_request_headers on;

server {
    listen       80;
    listen       443 ssl http2;
    server_name  admin.netkiller.cn;

    include /etc/nginx/default.d/*.conf;

    access_log /var/log/nginx/admin.netkiller.cn.access.log;
    error_log /var/log/nginx/admin.netkiller.cn.error.log;

    error_page 497 https://$host$uri?$args;
  
    if ($scheme = http) {
      return 301 https://$server_name$request_uri;
    }

    location / {
        auth_basic "Administrator's Area";
        auth_basic_user_file  htpasswd;
      root   /opt/netkiller.cn/admin.netkiller.cn;
      try_files $uri $uri/ /index.html;
      index  index.html;
    }

    location /api/ {
    auth_basic off;
    proxy_pass_request_headers on;
        proxy_set_header Host $http_host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header REMOTE-HOST $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_pass http://api.netkiller.cn:8080/;
    }

    error_page 404 /404.html;
        location = /40x.html {
    }

    error_page 500 502 503 504 /50x.html;
        location = /50x.html {
    }
}