Start getting Spike data in 3 steps. All Spike SDK async method calls should be wrapped into try catch block.

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Step 1 - Create Spike connection

To set up the Spike SDK create SpikeConnectionV3 instance with your Spike application id, application user id and signature unique to each of your apllication users (more on generating signatures here): 
import SpikeSDK
static func createConnectionAPIv3(
    applicationId: Int,
    signature: String,
    endUserId: String
) async throws -> SpikeConnectionAPIv3
)

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Step 2 - Ask user for permissions

Provide permissions to access iOS HealthKit data. Spike SDK method will check required permissions and request them if needed. Permission dialog may not be shown according on iOS permissions rules. 
try await spikeConnection.requestPermissions(forStatistics: [
        .stepsTotal,
        .distanceWalking,
    ]
)

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Step 3 - Get data

Info: The maximum permitted date range is 90 days There are 4 types of data you can retrieve from Spike:
  • Statistics are calculated values derived from records.
  • Activities are data about user’s activities or workouts.
  • Sleep is data about user’s sleep.
  • Records consist of the raw data points collected from user devices or applications.

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Statistics

Get daily statistics for steps and total distance from Apple Health: 
func getStatistics(
    ofTypes types: [StatisticsType.steps],
    from: Date.now.addingTimeInterval(-60 * 60 * 24),
    to: Date.now,
    interval: StatisticsInterval.hour,
    filter: StatisticsFilter(providers: [.apple])
) async throws -> [Statistic]
where: 
public enum StatisticsType: String {
    case steps
    case distanceTotal = "distance_total"
    case distanceWalking = "distance_walking"
    case distanceCycling = "distance_cycling"
    case distanceRunning = "distance_running"
    case caloriesBurnedTotal = "calories_burned_total"
    case caloriesBurnedBasal = "calories_burned_basal"
    case caloriesBurnedActive = "calories_burned_active"
}

public enum StatisticsInterval: String, Codable {
    case hour
    case day
}

public struct StatisticsFilter {
    public var excludeManual: Bool = false
    public var providers: [Provider]? = nil
}

// Result:

public struct Statistic: Codable, Hashable {
    public var start: Date
    public var end: Date
    public var duration: Int
    public var type: StatisticsType
    public var value: Double
    public var unit: Unit
    public var rowCount: Int?
    public var recordIds: [UUID]?
}

​
Records

func getRecords(
    ofTypes types: [MetricType.stepsTotal],
    from: Date.now.addingTimeInterval(-60 * 60 * 24),
    to: Date.now,
    filter: StatisticsFilter(providers: [.apple])
) async throws -> [Record]
where: 
public enum MetricType: String, Codable, Hashable {
    case stepsTotal
    case distanceTotal
    case distanceWalking
    case distanceCycling
    case distanceRunning
    case caloriesBurnedActive
    case caloriesBurnedBasal
    case caloriesBurnedTotal
}

// Result

public struct Record: Codable, Hashable {
    public var recordId: UUID
    public var inputMethod: InputMethod?
    public var startAt: Date
    public var endAt: Date?
    public var modifiedAt: Date
    public var duration: Int?
    public var provider: Provider?
    public var providerSource: ProviderSource?
    public var isSourceAggregated: Bool?
    public var source: RecordSource?
    public var metrics: [String: Double]?
    public var activityTags: [ActivityTag]?
    public var activityType: ActivityType?
    public var sessions: [ActivityEntry]?
    public var laps: [ActivityEntry]?
    public var segments: [ActivityEntry]?
    public var splits: [ActivityEntry]?
    public var samples: [ActivitySamples]?
    public var routePoints: [ActivitySamples]?
}

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Additional information

The spikeConnection.getUserInfo() call will only show that Apple HealthKit, Android Health Connect, or Samsung Health Data is enabled after you have successfully retrieved data at least once using functions like getStatistics(), getRecords(), or similar data retrieval methods.