How to use the parse/node.Error function in parse

RestWrite.prototype.transformUser = function() {
  var promise = Promise.resolve();

  if (this.className !== '_User') {
    return promise;
  }

  if (!this.auth.isMaster && 'emailVerified' in this.data) {
    const error = `Clients aren't allowed to manually update email verification.`;
    throw new Parse.Error(Parse.Error.OPERATION_FORBIDDEN, error);
  }

  // Do not cleanup session if objectId is not set
  if (this.query && this.objectId()) {
    // If we're updating a _User object, we need to clear out the cache for that user. Find all their
    // session tokens, and remove them from the cache.
    promise = new RestQuery(this.config, Auth.master(this.config), '_Session', {
      user: {
        __type: 'Pointer',
        className: '_User',
        objectId: this.objectId(),
      },
    })
      .execute()
      .then(results => {
        results.results.forEach(session =>

handleVerificationEmailRequest(req) {
    this._throwOnBadEmailConfig(req);

    const { email } = req.body;
    if (!email) {
      throw new Parse.Error(
        Parse.Error.EMAIL_MISSING,
        'you must provide an email'
      );
    }
    if (typeof email !== 'string') {
      throw new Parse.Error(
        Parse.Error.INVALID_EMAIL_ADDRESS,
        'you must provide a valid email string'
      );
    }

    return req.config.database.find('_User', { email: email }).then(results => {
      if (!results.length || results.length < 1) {
        throw new Parse.Error(
          Parse.Error.EMAIL_NOT_FOUND,
          `No user found with email ${email}`
        );
      }
      const user = results[0];

      // remove password field, messes with saving on postgres
      delete user.password;

RestWrite.prototype._validateEmail = function() {
  if (!this.data.email || this.data.email.__op === 'Delete') {
    return Promise.resolve();
  }
  // Validate basic email address format
  if (!this.data.email.match(/^.+@.+$/)) {
    return Promise.reject(
      new Parse.Error(
        Parse.Error.INVALID_EMAIL_ADDRESS,
        'Email address format is invalid.'
      )
    );
  }
  // Same problem for email as above for username
  return this.config.database
    .find(
      this.className,
      { email: this.data.email, objectId: { $ne: this.objectId() } },
      { limit: 1 },
      {},
      this.validSchemaController
    )
    .then(results => {
      if (results.length > 0) {

const calculateSkipAndLimit = (
  skipInput,
  first,
  after,
  last,
  before,
  maxLimit
) => {
  let skip = undefined;
  let limit = undefined;
  let needToPreCount = false;

  // Validates the skip input
  if (skipInput || skipInput === 0) {
    if (skipInput < 0) {
      throw new Parse.Error(
        Parse.Error.INVALID_QUERY,
        'Skip should be a positive number'
      );
    }
    skip = skipInput;
  }

  // Validates the after param
  if (after) {
    after = cursorToOffset(after);
    if ((!after && after !== 0) || after < 0) {
      throw new Parse.Error(
        Parse.Error.INVALID_QUERY,
        'After is not a valid cursor'
      );
    }

schema.fields[fieldName].type === 'Array'
      ) {
        const expectedType = parseTypeToPostgresType(schema.fields[fieldName]);
        if (expectedType === 'text[]') {
          updatePatterns.push(`$${index}:name = $${index + 1}::text[]`);
          values.push(fieldName, fieldValue);
          index += 2;
        } else {
          updatePatterns.push(`$${index}:name = $${index + 1}::jsonb`);
          values.push(fieldName, JSON.stringify(fieldValue));
          index += 2;
        }
      } else {
        debug('Not supported update', fieldName, fieldValue);
        return Promise.reject(
          new Parse.Error(
            Parse.Error.OPERATION_FORBIDDEN,
            `Postgres doesn't support update ${JSON.stringify(fieldValue)} yet`
          )
        );
      }
    }

    const where = buildWhereClause({ schema, index, query });
    values.push(...where.values);

    const whereClause =
      where.pattern.length > 0 ? `WHERE ${where.pattern}` : '';
    const qs = `UPDATE $1:name SET ${updatePatterns.join()} ${whereClause} RETURNING *`;
    debug('update: ', qs, values);
    const promise = (transactionalSession
      ? transactionalSession.t

castType = undefined;
          }
          constraintFieldName = castType
            ? `CAST ((${transformDotField(fieldName)}) AS ${castType})`
            : transformDotField(fieldName);
        } else {
          constraintFieldName = `$${index++}:name`;
          values.push(fieldName);
        }
        values.push(postgresValue);
        patterns.push(`${constraintFieldName} ${pgComparator} $${index++}`);
      }
    });

    if (initialPatternsLength === patterns.length) {
      throw new Parse.Error(
        Parse.Error.OPERATION_FORBIDDEN,
        `Postgres doesn't support this query type yet ${JSON.stringify(
          fieldValue
        )}`
      );
    }
  }
  values = values.map(transformValue);
  return { pattern: patterns.join(' AND '), values, sorts };
};

tryRouteRequest(method, path, request) {
    var match = this.match(method, path);
    if (!match) {
      throw new Parse.Error(
        Parse.Error.INVALID_JSON,
        'cannot route ' + method + ' ' + path
      );
    }
    request.params = match.params;
    return new Promise((resolve, reject) => {
      match.handler(request).then(resolve, reject);
    });
  }
}

return this._config.database.find('_User', query).then(users => {
      if (Array.isArray(users) && users.length > 0) {
        throw new Parse.Error(
          Parse.Error.OBJECT_NOT_FOUND,
          'Your account is locked due to multiple failed login attempts. Please try again after ' +
            this._config.accountLockout.duration +
            ' minute(s)'
        );
      }
    });
  }

handleGet(req) {
    const body = Object.assign(req.body, ClassesRouter.JSONFromQuery(req.query));
    const options = {};

    for (const key of Object.keys(body)) {
      if (ALLOWED_GET_QUERY_KEYS.indexOf(key) === -1) {
        throw new Parse.Error(Parse.Error.INVALID_QUERY, 'Improper encode of parameter');
      }
    }

    if (typeof body.keys == 'string') {
      options.keys = body.keys;
    }
    if (body.include) {
      options.include = String(body.include);
    }

    return rest.get(req.config, req.auth, this.className(req), req.params.objectId, options, req.info.clientSDK)
      .then((response) => {
        if (!response.results || response.results.length == 0) {
          throw new Parse.Error(Parse.Error.OBJECT_NOT_FOUND, 'Object not found.');
        }