public SamlIdentityProviderConfigBuilder ssoEndpoint(SamlEndpoint ssoEndpoint) {
        this.ssoEndpoint = requireNonNull(ssoEndpoint, "ssoEndpoint");
        return this;
    }
Sets a single sign-on endpoint of an identity provider.
saml/src/main/java/com/linecorp/armeria/server/saml/SamlIdentityProviderConfigBuilder.java