The above is the error reported by the endpoint accessing oauth2, mainly because the configuration is not well configured, and the configuration before modification:

    @Bean
    @Override
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }

Modified configuration:

    @Bean
    @Override
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.jdbcAuthentication()
                .dataSource(dataSource)
                .passwordEncoder(new BCryptPasswordEncoder());
    }