How to use the botframework-connector.GovernmentConstants.ToChannelFromBotOAuthScope function in botframework-connector

// If the request is for skills, we need to create an AppCredentials instance with
        // the correct scope for communication between the caller and the skill.
        if (botAppId && SkillValidation.isSkillClaim(identity.claims)) {
            const scope = JwtTokenValidation.getAppIdFromClaims(identity.claims);
            if (this.credentials.oAuthScope === scope) {
                // Do nothing, the current credentials and its scope are valid for the skill.
                // i.e. the adatper instance is pre-configured to talk with one skill.
            } else {
                // Since the scope is different, we will create a new instance of the AppCredentials
                // so this.credentials.oAuthScope isn't overridden.
                credentials = await this.buildCredentials(botAppId, scope);

                if (JwtTokenValidation.isGovernment(this.settings.channelService)) {
                    credentials.oAuthEndpoint = GovernmentConstants.ToChannelFromBotLoginUrl;
                    // Not sure that this code is correct because the scope was set earlier.
                    credentials.oAuthScope = GovernmentConstants.ToChannelFromBotOAuthScope;
                }
            }
        }

        const client: ConnectorClient = this.createConnectorClientInternal(serviceUrl, credentials);
        return client;
    }

this.isEmulatingOAuthCards = false;

        // If no channelService or openIdMetadata values were passed in the settings, check the process' Environment Variables for values.
        // These values may be set when a bot is provisioned on Azure and if so are required for the bot to properly work in Public Azure or a National Cloud.
        this.settings.channelService = this.settings.channelService || process.env[AuthenticationConstants.ChannelService];
        this.settings.openIdMetadata = this.settings.openIdMetadata || process.env[AuthenticationConstants.BotOpenIdMetadataKey];

        this.authConfiguration = this.settings.authConfig || new AuthenticationConfiguration();

        if (this.settings.openIdMetadata) {
            ChannelValidation.OpenIdMetadataEndpoint = this.settings.openIdMetadata;
            GovernmentChannelValidation.OpenIdMetadataEndpoint = this.settings.openIdMetadata;
        }
        if (JwtTokenValidation.isGovernment(this.settings.channelService)) {
            this.credentials.oAuthEndpoint = GovernmentConstants.ToChannelFromBotLoginUrl;
            this.credentials.oAuthScope = GovernmentConstants.ToChannelFromBotOAuthScope;
        }

        // If a NodeWebSocketFactoryBase was passed in, set it on the BotFrameworkAdapter.
        if (this.settings.webSocketFactory) {
            this.webSocketFactory = this.settings.webSocketFactory;
        }

        // Relocate the tenantId field used by MS Teams to a new location (from channelData to conversation)
        // This will only occur on activities from teams that include tenant info in channelData but NOT in conversation,
        // thus should be future friendly.  However, once the the transition is complete. we can remove this.
        this.use(async(context, next) => {
            if (context.activity.channelId === 'msteams' && context.activity && context.activity.conversation && !context.activity.conversation.tenantId && context.activity.channelData && context.activity.channelData.tenant) {
                context.activity.conversation.tenantId = context.activity.channelData.tenant.id;
            }
            await next();
        });

private async getAppCredentials(appId: string, oAuthScope?: string): Promise {
        if (!appId) {
            return new MicrosoftAppCredentials('', '');
        }

        const cacheKey = `${ appId }${ oAuthScope }`;
        let appCredentials = BotFrameworkHttpClient.appCredentialMapCache.get(cacheKey);
        if (appCredentials) {
            return appCredentials;
        }

        const appPassword = await this.credentialProvider.getAppPassword(appId);
        if (JwtTokenValidation.isGovernment(this.channelService)) {
            appCredentials = new MicrosoftAppCredentials(appId, appPassword, this.channelService);
            appCredentials.oAuthEndpoint = GovernmentConstants.ToChannelFromBotLoginUrl;
            appCredentials.oAuthScope = GovernmentConstants.ToChannelFromBotOAuthScope;
        } else {
            appCredentials = new MicrosoftAppCredentials(appId, appPassword, this.channelService);
            appCredentials.oAuthScope = !oAuthScope ? AuthenticationConstants.ToChannelFromBotOAuthScope : oAuthScope;
        }

        // Cache the credentials for later use
        BotFrameworkHttpClient.appCredentialMapCache.set(cacheKey, appCredentials);
        return appCredentials;
    }
}