How to use the @0xcert/ethereum-generic-provider.SignMethod.ETH_SIGN function in @0xcert/ethereum-generic-provider

claim.forEach((c) => {
      const [kind, signature] = c.split(':');
      const k = (parseInt(kind) == SignMethod.PERSONAL_SIGN) ? SignMethod.ETH_SIGN : kind;
      const signatureData = {
        r: signature.substr(0, 66),
        s: `0x${signature.substr(66, 64)}`,
        v: parseInt(`0x${signature.substr(130, 2)}`),
        k,
      };

      if (signatureData.v < 27) {
        signatureData.v = signatureData.v + 27;
      }
      signatures.push(signatureData);
    });
    return toTuple(signatures);

export function createSignatureTuple(claim: string) {
  const [kind, signature] = claim.split(':');
  const k = (parseInt(kind) == SignMethod.PERSONAL_SIGN) ? SignMethod.ETH_SIGN : kind;

  const signatureData = {
    r: signature.substr(0, 66),
    s: `0x${signature.substr(66, 64)}`,
    v: parseInt(`0x${signature.substr(130, 2)}`),
    k,
  };

  if (signatureData.v < 27) {
    signatureData.v = signatureData.v + 27;
  }

  return toTuple(signatureData);
}

export function createSignatureTuple(claim: string) {
  const [kind, signature] = claim.split(':');
  const k = (parseInt(kind) == SignMethod.PERSONAL_SIGN) ? SignMethod.ETH_SIGN : kind;

  const signatureData = {
    r: signature.substr(0, 66),
    s: `0x${signature.substr(66, 64)}`,
    v: parseInt(`0x${signature.substr(130, 2)}`),
    k,
  };

  if (signatureData.v < 27) {
    signatureData.v = signatureData.v + 27;
  }

  return toTuple(signatureData);
}

export function createSignatureTuple(claim: string) {
  const [kind, signature] = claim.split(':');
  const k = (parseInt(kind) == SignMethod.PERSONAL_SIGN) ? SignMethod.ETH_SIGN : kind;

  const signatureData = {
    r: signature.substr(0, 66),
    s: `0x${signature.substr(66, 64)}`,
    v: parseInt(`0x${signature.substr(130, 2)}`),
    k,
  };

  if (signatureData.v < 27) {
    signatureData.v = signatureData.v + 27;
  }

  return toTuple(signatureData);
}

public async init() {
    let msg = 'test';
    if (this.provider.signMethod === SignMethod.ETH_SIGN) {
      msg = await sha(256, msg);
    }

    const signature = await this.provider.sign(`0x${msg}`);
    const signatureType = this.provider.signMethod;
    this.authentication = `${signatureType}:${signature}`;

    let data = null;
    try {
      const accountData = await clientFetch(`${this.apiUrl}/account`, {
        method: 'GET',
        headers: {
          'Content-Type': 'application/json',
          'Authorization': this.authentication,
        },
      });