How to use the blockstack.signUserOut function in blockstack

let authProvider = JSON.parse(localStorage.getItem("authProvider"));
  console.log(authProvider);
  if (authProvider === "uPort") {
    await localStorage.removeItem("authProvider");
    await localStorage.removeItem("uPortUser");
    await localStorage.removeItem("profileFound");
    await localStorage.removeItem("oauthData");
    await localStorage.removeItem("storageProvider");
    await localStorage.removeItem("graphite_keys");
    window.location.replace("/");
  } else {
    if (isUserSignedIn()) {
      //Handle Blockstack sign out
      await localStorage.removeItem("authProvider");
      await localStorage.removeItem("blockstackUser");
      signUserOut(window.location.origin);
    }
  }
}

_handleSignOut(e) {
    e.preventDefault();
    signUserOut(window.location.origin + "?blockstack");
  }

handleSignOut(e) {
    e.preventDefault();
    signUserOut(window.location.origin);
  }

handleSignOut(e) {
    e.preventDefault();
    signUserOut(window.location.origin);
  }

handleSignOut(e) {
    e.preventDefault();
    signUserOut(window.location.origin);
  }

            <button> signUserOut(window.location.origin)}&gt;
              Sign out</button>

handleSignOut(e) {
    e.preventDefault();
    signUserOut(window.location.origin);
  }

handleSignOut(e) {
    e.preventDefault();
    signUserOut(window.location.origin);
  }

handleSignOut(e) {
    e.preventDefault();
    signUserOut(window.location.origin);
  }

handleSignOut(e) {
    e.preventDefault();
    signUserOut(window.location.origin);
  }