OAuth2: fix logout

[pascalgrimaud]

OAuth2+Logout is broken since v7.5.0
It was removed here https://github.com/jhipster/generator-jhipster/pull/17162/files

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[mshima]

The logout function is bugged and misleading.
The login method does the redirection:

generator-jhipster/generators/client/templates/vue/src/main/webapp/app/account/login.service.ts.ejs

Line 29 in b2949af

loc.href = `//${loc.hostname}${port}${contextPath}oauth2/authorization/oidc`;

The logout function should be called getLogoutUrl or do the logout itself.

generator-jhipster/generators/client/templates/vue/src/main/webapp/app/account/login.service.ts.ejs

Lines 34 to 36 in b2949af

	public logout() : AxiosPromise<any> {
	return axios.post('api/logout');
	}

[pascalgrimaud]

@mshima : do you mean this fix is not correct?

Currently:

• click on sign out in the app
• click on sign in, no need to enter the password, because you are already authenticated in Keycloak